Very Strong shallow earthquake / aftershock near Seddon, South Island, New Zealand + Aftershock pattern

Last update: August 17, 2013 at 9:55 am by By

This is our main in-depth article from the very strong M6.5 earthquake in the Cook Strait where it all started

Present AFTERSHOCK cycle

Update August 17 09:50 UTC :
5 people have been injured by the mainshock and the 2 very strong aftershocks
As what happened after the July 21 mainshock, also the August 16 mainshock will be followed by a vast number of sometimes very strong aftershocks. The aftershock pattern changes with every earthquake and New Zealand Cook Strait area has really bad luck. The main problem is that no-one can predict what the strength of the next one will be. Very strong ones (+M6) are certainly part of the possibilities. Big difference compared to the July mainshock is the epicenter location(s). They are now below land and thus a lot more dangerous than the July ones. Better for Wellington, indeed (greater distance), but a lot more dangerous for Seddon and Blenheim.
The 2 maps below are showing the aftershock pattern of yesterday and today.  The epicenters have shifted a little more to Seddon and Blenheim. Kaikoura seems to be holding its position away from the turbulence. Also to note is that today’s aftershocks are with a few exceptions all below land.
Based on what we read on Twitter life goes on as before, even in Seddon and Blenheim.
All the aftershocks of August 17 can be seen on this page.
In-depth coverage of the misery in  all small details can best be viewed in the following websites :
Stuff.co.nz
TVNZ
Best earthquake data at Geonet (New Zealand) and at Earthquake-Report.com (mainly because we bring many sources and also the experience of some people who felt the earthquakes).

Screen Shot 2013-08-17 at 11.42.33

Main-shock and aftershocks for August 16 (whole UTC day)

Screen Shot 2013-08-17 at 11.43.10

Main-shock and aftershocks for August 17 (midnight UTC until 09:45 UTC)


Update 07:10 UTC : Nothing really new since our 06:08 update. The NZ press is mainly zooming in to small stories of the panic and the secondary effects like heavy traffic, experience reports of minor damage etc. All the aftershocks of M2.9 or greater will be listed below.

Update 06:08 UTC : One building south of Seddon nearly collapsed by the mainshock. Some others in Marlborough region were also severely damaged, while the damage on North Island (Wellington region) is only minor.

Update 06:01 UTC : GeoNet has changed the data to Magnitude 6.0. USGS and EMSC give Magnitude 5.9 (USGS expecting a heavy intensity again). The epicenter location is again close to Seddon, the quake was felt in many parts of New Zealand. New damage is likely.
In the meantime buildings in Seddon were ckcked for damage by the mainshock. Many of the buildings were damaged, mainly fallen chimneys and cracked walls and roofs are reported. No building collapsed, nobody was injured.

Update 05:38 UTC : Another very strong quake with Magnitude 6.3 hit this are a couple of minutes ago, according to GeoNet. These data are still prelimimary.

Update 05:28 UTC : Two injured people were carried to a hospital in Blenheim. There are not many details about the kind of injuries but reports indicate they are only minor.

Update 04:43 UTC : Taken into account the strong Magnitude and the extremely shallow Hypocenter,  we are happy that no injuries and even fatalities have been reported. Also the damage is within an acceptable range as no houses really collapsed. The slight to moderate damage will however be reported in big numbers. The most reports will come from Seddon, followed by Blenheim and then by Wellington.

Update 04:32 UTC : GNS Science has recalculated the data and is now reporting an updated value of M6.6 !

Update 04:32 UTC : NZ Media are starting to exaggerate : Monster Quake hit … We can truly say that this was a big quake but not a monster quake. Based on security camera images we saw some moderate shaking in Wellington.

Update 04:25 UTC : The biggest damage should be looked at in the Seddon area. Gradually Seddon information and pictures are reaching us, like the one below from Seddon. Unsafe to live in, it will probably get a RED STICKER on the door from the NZQC after inspection.

Twitter image courtesy and copyright from @breakfastsam

Twitter image courtesy and copyright from @breakfastsam

Update 04:15 UTC : A house has been badly damaged in Ward, south of Seddon + some power lines down in the Seddon area

Update 04:06 UTC : SH 1 currently closed between Blenheim and Kaikoura. Check NZTA website for latest highway conditions:

http://t.co/d6e18GP2XW

Update 04:02 UTC : A number of people have been freed from lifts in the Wellington CBD which stopped when the quake struck.

Update 04:00 UTC : Earlier reports of a collapsed house in between Blenheim and Seddon looked to be incorrect. So far only a lot of slight damage in the Marlborough area (Seddon, Blenheim etc) and also in the Wellington area.

Typical picture after such an earthquake. A supermarket in Wellington !

Screen Shot 2013-08-16 at 05.54.01

Twitter image courtesy and copyright @LivLacey

Update 03:52 UTC : The NZ Stock Exchange has been reopened again

Update 03:46 UTC : Damage like the picture below will occur in many places. The NZ Earthquake Commission will have a lot of work the following days to follow up the many filed damage reports.

Screen Shot 2013-08-16 at 05.46.10

Twitter image courtesy and copyright @menabassily NZ

Update 03:44 UTC :  The NZ stock exchange has stopped trading. About 600 customers are reportedly without power in Makara, Wrights Hill and Wainuiomata following the quake

Update 03:44 UTC : The earthquake has been felt all over both islands. Power is still on the Wellington CBD (Central Business District) and traffic is flowing normally, however some power lines are reported to be down and there are problems with some phones.
Tranzmetro has suspended all its rail and bus services in Wellington and Wellington Airport advises the runway is temporarily closed for inspection following the quake.

Update 03:42 UTC : Focal Mechanism in line with the earlier Cook Strait M6.5 earthquake if based on USGS FM

Screen Shot 2013-08-16 at 05.40.31

Update 03:38 UTC : South of Blenheim, towards Seddon, roads are partially blocked by rockfalls and are cracked in some areas.

Update 03:34 UTC : Luckily only reports of what we call “minor damage” in the New Zealand press so far. Minor damage is like broken windows, cracks in walls, fallen tiles etc.

Update 03:31 UTC : What strikes us in the New Zealand press is that all of them are talking about a “Wellington” earthquake and not about a Seddon earthquake . The distance to Wellington is far greater than to Seddon.

Update 03:27 UTC : We expect most damage in the whole North Eastern part of the South Island with some slight damage even at the south of the North Island. Seddon, only located at 10 km of the epicenter is most at risk for damage followed by Blenheim.

Update 03:22 UTC : Based on what we experienced with the M6.5 mainshock a little while ago a chain of aftershocks in the same area may be expected.

Update 03:20 UTC : A lot of different data below like USGS who reports a M6.8 at a depth of 10.6 km. We prefer however tu use the Geonet / GNS science data who are reporting M6.2 at a depth of 8 km. Even more a difference in epicenter location. The preliminary USGS value is putting the epicenter more below land vs the Geonet versions who is locating the epicenter also below land but close to the coast.

Update 03:18 UTC : these aftershocks will go on for quiet some time ane very strong ones are being possible.

Update : The seismogram below reveals a long chain of powerful aftershocks, some of them more than M5.

Screen Shot 2013-08-16 at 05.09.35

Very dangerous aftershock below land in New Zealand. Epicenter is very different with each reporting agency. Geonet New Zealand is locating the epicenter at the land-tip of the South Island. The earlier mainshock and most of the aftershocks were located in the sea.

Image courtesy Geonet New Zealand

Image courtesy Geonet New Zealand

10 km south-east of Seddon

Most important Earthquake Data:

Magnitude : 6.2

Local Time (conversion only below land) : 2013-08-16 14:31:05

GMT/UTC Time : 2013-08-16 02:31:05

Depth (Hypocenter)  : 8 km

Depth and Magnitude updates in the list below.

Share your earthquake experience (I Have Felt It) with our readers.
Click on the “I Felt It” button behind the corresponding earthquake. Your earthquake experience is not only important for science, but also for people in the area as well as our global readership.

SRC Location UTC Date/time M D INFO
GEONET Seddon Aug 16 23:38 3.1 5 MAP I Felt It INFO
GEONET Seddon Aug 16 22:50 3.1 5 MAP I Felt It
GEONET Seddon Aug 16 22:48 3.8 13 MAP I Felt It
GEONET Seddon Aug 16 22:42 3.1 13 MAP I Felt It
GEONET Seddon Aug 16 22:35 3.3 14 MAP I Felt It
GEONET Seddon Aug 16 22:23 4.2 20 MAP I Felt It
GEONET Seddon Aug 16 22:21 4.3 11 MAP I Felt It
GEONET Seddon Aug 16 21:40 3.8 5 MAP I Felt It
GEONET Seddon Aug 16 21:20 4.1 21 MAP I Felt It
GEONET Seddon Aug 16 20:57 3.2 9 MAP I Felt It
GEONET Seddon Aug 16 20:31 3.1 16 MAP I Felt It
GEONET Seddon Aug 16 20:20 3.2 13 MAP I Felt It
GEONET Seddon Aug 16 20:17 3.9 9 MAP I Felt It
GEONET Seddon Aug 16 20:16 3.8 5 MAP I Felt It
GEONET Seddon Aug 16 20:13 3.7 15 MAP I Felt It
GEONET Seddon Aug 16 20:09 3.2 5 MAP I Felt It
GEONET Seddon Aug 16 20:07 3.1 8 MAP I Felt It INFO
GEONET Seddon Aug 16 19:07 3.6 15 MAP I Felt It
GEONET Seddon Aug 16 18:53 3.2 20 MAP I Felt It INFO
GEONET Seddon Aug 16 18:20 3.7 10 MAP I Felt It
GEONET Seddon Aug 16 18:17 3.4 5 MAP I Felt It
GEONET Seddon Aug 16 17:58 3.6 14 MAP I Felt It
GEONET Seddon Aug 16 17:52 3.3 9 MAP I Felt It INFO
GEONET Seddon Aug 16 16:41 3.9 18 MAP I Felt It INFO
GEONET Picton Aug 16 16:27 3.5 13 MAP I Felt It
GEONET Seddon Aug 16 16:27 3.3 8 MAP I Felt It
GEONET Seddon Aug 16 15:51 3.7 5 MAP I Felt It
GEONET Seddon Aug 16 15:48 3.3 8 MAP I Felt It
GEONET Seddon Aug 16 15:46 4.2 12 MAP I Felt It INFO
GEONET Seddon Aug 16 15:44 4.0 5 MAP I Felt It
GEONET Seddon Aug 16 14:50 3.2 5 MAP I Felt It
EMSC Cook Strait, New Zealand Aug 16 14:47 4.5 21 MAP I Felt It
USGS Blenheim, New Zealand Aug 16 14:47 4.5 21 MAP I Felt It
USGS Blenheim, New Zealand Aug 16 14:47 4.6 11 MAP I Felt It
GEONET Seddon Aug 16 14:47 4.9 20 MAP I Felt It
GEONET Seddon Aug 16 14:40 3.5 20 MAP I Felt It
GEONET Seddon Aug 16 14:29 3.2 5 MAP I Felt It
GEONET Seddon Aug 16 14:23 3.2 7 MAP I Felt It
GEONET Seddon Aug 16 14:15 3.1 21 MAP I Felt It
GEONET Seddon Aug 16 14:09 3.4 5 MAP I Felt It
GEONET Seddon Aug 16 13:35 4.3 28 MAP I Felt It INFO
GEONET Seddon Aug 16 13:17 3.5 6 MAP I Felt It
GEONET Seddon Aug 16 13:13 3.1 11 MAP I Felt It
GEONET Picton Aug 16 13:03 3.9 9 MAP I Felt It
GEONET Seddon Aug 16 13:02 3.8 13 MAP I Felt It
GEONET Seddon Aug 16 12:59 4.1 5 MAP I Felt It
GEONET Seddon Aug 16 12:50 3.2 13 MAP I Felt It
GEONET Seddon Aug 16 12:38 3.4 13 MAP I Felt It
GEONET Seddon Aug 16 12:31 3.5 10 MAP I Felt It
GEONET Seddon Aug 16 12:24 3.4 19 MAP I Felt It
GEONET Seddon Aug 16 11:40 3.1 17 MAP I Felt It
GEONET Seddon Aug 16 11:17 4.1 10 MAP I Felt It
GEONET Seddon Aug 16 11:07 3.8 14 MAP I Felt It
GEONET Seddon Aug 16 11:04 3.8 12 MAP I Felt It
GEONET Seddon Aug 16 11:03 3.1 24 MAP I Felt It
GEONET Seddon Aug 16 11:01 3.3 26 MAP I Felt It
GEONET Seddon Aug 16 10:56 3.2 16 MAP I Felt It
GEONET Seddon Aug 16 10:52 3.8 9 MAP I Felt It
GEONET Seddon Aug 16 10:43 3.1 16 MAP I Felt It
GEONET Seddon Aug 16 10:35 3.7 5 MAP I Felt It
GEONET Seddon Aug 16 10:25 3.1 7 MAP I Felt It
GEONET Seddon Aug 16 10:22 3.3 20 MAP I Felt It
GEONET Seddon Aug 16 10:05 3.3 12 MAP I Felt It
GEONET Seddon Aug 16 09:42 3.4 18 MAP I Felt It
GEONET Seddon Aug 16 09:32 3.2 18 MAP I Felt It INFO
GEONET Seddon Aug 16 09:21 3.6 5 MAP I Felt It
GEONET Seddon Aug 16 09:20 3.4 14 MAP I Felt It
GEONET Blenheim Aug 16 09:11 3.8 13 MAP I Felt It
GEONET Seddon Aug 16 09:11 3.3 21 MAP I Felt It
GEONET Seddon Aug 16 09:09 3.1 5 MAP I Felt It
GEONET Seddon Aug 16 09:04 3.1 11 MAP I Felt It
GEONET Seddon Aug 16 09:01 3.4 7 MAP I Felt It
GEONET Seddon Aug 16 08:59 3.6 22 MAP I Felt It
GEONET Seddon Aug 16 08:52 3.8 13 MAP I Felt It
GEONET Seddon Aug 16 08:49 3.5 5 MAP I Felt It
GEONET Seddon Aug 16 08:43 3.6 10 MAP I Felt It
USGS Blenheim, New Zealand Aug 16 08:38 4.7 11 MAP I Felt It
GEOFON Cook Strait, New Zealand Aug 16 08:38 4.6 22 MAP I Felt It
EMSC Cook Strait, New Zealand Aug 16 08:38 4.7 11 MAP I Felt It
USGS Blenheim, New Zealand Aug 16 08:38 4.6 9 MAP I Felt It
GEONET Seddon Aug 16 08:38 5.2 22 MAP I Felt It
GEONET Seddon Aug 16 08:35 3.7 5 MAP I Felt It
GEONET Seddon Aug 16 08:29 3.4 17 MAP I Felt It INFO
GEONET Seddon Aug 16 08:24 3.5 30 MAP I Felt It
GEONET Seddon Aug 16 08:17 3.2 8 MAP I Felt It
GEONET Seddon Aug 16 08:13 3.2 5 MAP I Felt It
GEONET Seddon Aug 16 08:12 3.1 11 MAP I Felt It
GEONET Seddon Aug 16 08:05 3.2 5 MAP I Felt It
GEONET Seddon Aug 16 08:01 3.5 5 MAP I Felt It
GEONET Seddon Aug 16 07:59 4.0 5 MAP I Felt It
GEONET Seddon Aug 16 07:53 3.9 5 MAP I Felt It
GEONET Seddon Aug 16 07:37 3.2 5 MAP I Felt It
GEONET Seddon Aug 16 07:26 4.2 21 MAP I Felt It
GEONET Seddon Aug 16 07:23 4.7 27 MAP I Felt It INFO
GEONET Wellington Aug 16 07:18 3.6 9 MAP I Felt It
GEONET Seddon Aug 16 07:18 3.5 9 MAP I Felt It
GEONET Seddon Aug 16 07:13 4.0 13 MAP I Felt It
GEONET Seddon Aug 16 07:10 3.7 22 MAP I Felt It
GEONET Seddon Aug 16 07:06 3.8 18 MAP I Felt It
GEONET Seddon Aug 16 07:02 3.6 14 MAP I Felt It
GEONET Seddon Aug 16 07:00 3.2 24 MAP I Felt It
USGS Blenheim, New Zealand Aug 16 06:55 4.9 11 MAP I Felt It
EMSC Cook Strait, New Zealand Aug 16 06:55 5.1 10 MAP I Felt It
GEOFON Cook Strait, New Zealand Aug 16 06:55 5.1 14 MAP I Felt It
GEONET Seddon Aug 16 06:55 5.5 20 MAP I Felt It
GEONET Seddon Aug 16 06:53 4.9 18 MAP I Felt It
GEONET Seddon Aug 16 06:48 3.5 15 MAP I Felt It
GEONET Seddon Aug 16 06:47 3.5 5 MAP I Felt It
GEONET Seddon Aug 16 06:42 5.2 20 MAP I Felt It
GEONET Seddon Aug 16 06:38 3.3 6 MAP I Felt It
GEONET Seddon Aug 16 06:36 3.7 5 MAP I Felt It
GEONET Seddon Aug 16 06:33 3.7 22 MAP I Felt It
GEONET Seddon Aug 16 06:27 3.7 13 MAP I Felt It
GEONET Seddon Aug 16 06:24 3.4 12 MAP I Felt It
GEONET Blenheim Aug 16 06:23 3.6 10 MAP I Felt It INFO
GEONET Seddon Aug 16 06:21 3.7 12 MAP I Felt It
GEONET Seddon Aug 16 06:16 3.6 12 MAP I Felt It
GEONET Seddon Aug 16 06:08 4.1 16 MAP I Felt It
GEOFON Cook Strait, New Zealand Aug 16 05:58 4.9 10 MAP I Felt It
USGS Blenheim, New Zealand Aug 16 05:58 5.0 13 MAP I Felt It
GEOFON South Island, New Zealand Aug 16 05:57 4.8 10 MAP I Felt It
USGS Blenheim, New Zealand Aug 16 05:57 4.8 16 MAP I Felt It
EMSC Cook Strait, New Zealand Aug 16 05:57 5.0 14 MAP I Felt It
USGS Blenheim, New Zealand Aug 16 05:57 4.7 12 MAP I Felt It
GEONET Seddon Aug 16 05:57 5.1 5 MAP I Felt It
GEONET Seddon Aug 16 05:56 5.0 10 MAP I Felt It
GEONET Seddon Aug 16 05:53 3.2 5 MAP I Felt It
GEONET Seddon Aug 16 05:51 3.8 10 MAP I Felt It
GEONET Seddon Aug 16 05:49 4.5 23 MAP I Felt It
GEONET Seddon Aug 16 05:46 3.6 7 MAP I Felt It
GEONET Seddon Aug 16 05:42 3.7 37 MAP I Felt It
GEONET Wellington Aug 16 05:41 4.1 5 MAP I Felt It
GEONET Wellington Aug 16 05:37 4.6 10 MAP I Felt It
GEONET Seddon Aug 16 05:37 3.7 10 MAP I Felt It
GEONET Seddon Aug 16 05:34 4.4 12 MAP I Felt It
USGS Blenheim, New Zealand Aug 16 05:31 5.9 10 MAP I Felt It
EMSC Cook Strait, New Zealand Aug 16 05:31 5.8 21 MAP I Felt It
USGS Blenheim, New Zealand Aug 16 05:31 5.8 11 MAP I Felt It
GEOFON Cook Strait, New Zealand Aug 16 05:31 5.8 21 MAP I Felt It
GEONET Seddon Aug 16 05:31 6.0 14 MAP I Felt It
GEONET Picton Aug 16 05:30 6.2 24 MAP I Felt It
GEONET Seddon Aug 16 05:29 6.2 11 MAP I Felt It
USGS Blenheim, New Zealand Aug 16 05:26 4.6 17 MAP I Felt It
EMSC Cook Strait, New Zealand Aug 16 05:26 4.6 18 MAP I Felt It INFO
GEOFON Cook Strait, New Zealand Aug 16 05:26 4.7 10 MAP I Felt It INFO
GEONET Seddon Aug 16 05:26 4.9 10 MAP I Felt It
GEONET Seddon Aug 16 05:24 4.6 5 MAP I Felt It
GEONET Seddon Aug 16 05:22 3.5 11 MAP I Felt It INFO
GEONET Seddon Aug 16 05:15 4.1 6 MAP I Felt It
GEONET Seddon Aug 16 05:14 4.1 22 MAP I Felt It
GEONET Seddon Aug 16 05:08 3.1 12 MAP I Felt It
GEONET Seddon Aug 16 05:06 3.4 12 MAP I Felt It
GEONET Seddon Aug 16 05:02 4.3 5 MAP I Felt It
GEONET Seddon Aug 16 04:58 3.6 8 MAP I Felt It
GEONET Seddon Aug 16 04:56 3.8 8 MAP I Felt It
GEONET Seddon Aug 16 04:52 4.1 19 MAP I Felt It
GEONET Seddon Aug 16 04:50 3.6 6 MAP I Felt It
GEONET Seddon Aug 16 04:46 3.6 5 MAP I Felt It
GEONET Blenheim Aug 16 04:42 3.4 6 MAP I Felt It
GEONET Seddon Aug 16 04:32 3.5 7 MAP I Felt It
GEONET Wellington Aug 16 04:25 3.8 144 MAP I Felt It
GEONET Seddon Aug 16 04:24 3.9 5 MAP I Felt It
GEONET Seddon Aug 16 04:23 3.6 12 MAP I Felt It INFO
GEONET Seddon Aug 16 04:21 3.2 9 MAP I Felt It
GEONET Seddon Aug 16 04:18 3.3 12 MAP I Felt It
GEONET Seddon Aug 16 04:12 3.8 46 MAP I Felt It
GEONET Seddon Aug 16 04:11 3.9 13 MAP I Felt It
GEONET Seddon Aug 16 04:08 3.3 5 MAP I Felt It
GEONET Seddon Aug 16 04:06 3.4 10 MAP I Felt It
GEONET Wellington Aug 16 04:04 4.2 18 MAP I Felt It
GEONET Seddon Aug 16 04:03 4.4 5 MAP I Felt It
GEONET Seddon Aug 16 04:02 4.1 17 MAP I Felt It
GEONET Seddon Aug 16 04:00 3.6 13 MAP I Felt It
GEONET Seddon Aug 16 03:58 3.5 5 MAP I Felt It
GEONET Seddon Aug 16 03:56 3.7 12 MAP I Felt It
GEOFON Cook Strait, New Zealand Aug 16 03:51 4.6 15 MAP I Felt It
USGS Blenheim, New Zealand Aug 16 03:51 5.1 10 MAP I Felt It
EMSC Cook Strait, New Zealand Aug 16 03:51 5.5 30 MAP I Felt It
GEONET Seddon Aug 16 03:51 5.6 19 MAP I Felt It
GEONET Seddon Aug 16 03:49 3.6 5 MAP I Felt It
GEONET Seddon Aug 16 03:47 3.1 12 MAP I Felt It
GEONET Picton Aug 16 03:46 3.1 21 MAP I Felt It
GEONET Seddon Aug 16 03:42 3.7 6 MAP I Felt It
GEONET Seddon Aug 16 03:39 3.8 6 MAP I Felt It
GEONET Seddon Aug 16 03:37 3.8 5 MAP I Felt It
GEONET Seddon Aug 16 03:35 3.8 8 MAP I Felt It
GEONET Seddon Aug 16 03:34 3.4 5 MAP I Felt It
GEONET Seddon Aug 16 03:30 4.3 16 MAP I Felt It
GEONET Seddon Aug 16 03:29 4.4 40 MAP I Felt It
GEOFON Cook Strait, New Zealand Aug 16 03:26 4.9 10 MAP I Felt It
EMSC Cook Strait, New Zealand Aug 16 03:26 4.7 21 MAP I Felt It
USGS Blenheim, New Zealand Aug 16 03:26 4.7 21 MAP I Felt It
GEONET Seddon Aug 16 03:26 5.0 9 MAP I Felt It INFO
GEONET Seddon Aug 16 03:25 4.9 26 MAP I Felt It
GEOFON Cook Strait, New Zealand Aug 16 03:21 4.8 10 MAP I Felt It
EMSC Cook Strait, New Zealand Aug 16 03:21 5.0 17 MAP I Felt It
USGS Blenheim, New Zealand Aug 16 03:21 5.0 17 MAP I Felt It
GEONET Seddon Aug 16 03:21 5.0 17 MAP I Felt It
GEONET Picton Aug 16 03:15 4.6 5 MAP I Felt It
GEONET Seddon Aug 16 03:12 4.2 34 MAP I Felt It
EMSC South Island Of New Zealand Aug 16 03:09 5.9 10 MAP I Felt It
GEOFON South Island, New Zealand Aug 16 03:09 5.3 10 MAP I Felt It
USGS Blenheim, New Zealand Aug 16 03:09 5.9 10 MAP I Felt It
GEONET Seddon Aug 16 03:08 5.5 8 MAP I Felt It
GEONET Seddon Aug 16 03:06 4.6 5 MAP I Felt It
GEONET Blenheim Aug 16 03:03 3.2 35 MAP I Felt It
USGS Blenheim, New Zealand Aug 16 02:56 4.8 12 MAP I Felt It
EMSC Cook Strait, New Zealand Aug 16 02:56 5.2 5 MAP I Felt It
USGS Brooklyn, New Zealand Aug 16 02:56 5.2 5 MAP I Felt It
GEONET Seddon Aug 16 02:56 5.0 9 MAP I Felt It
GEONET Seddon Aug 16 02:53 4.5 5 MAP I Felt It
GEONET Wellington Aug 16 02:50 4.5 5 MAP I Felt It
USGS Blenheim, New Zealand Aug 16 02:45 5.5 9 MAP I Felt It
GEOFON Cook Strait, New Zealand Aug 16 02:45 5.0 10 MAP I Felt It
GEONET Seddon Aug 16 02:45 5.4 6 MAP I Felt It
EMSC Cook Strait, New Zealand Aug 16 02:45 5.7 15 MAP I Felt It
USGS Blenheim, New Zealand Aug 16 02:45 5.7 5 MAP I Felt It
GEONET Seddon Aug 16 02:41 4.4 5 MAP I Felt It
GEOFON Cook Strait, New Zealand Aug 16 02:37 5.2 10 MAP I Felt It
USGS Blenheim, New Zealand Aug 16 02:37 5.4 2 MAP I Felt It
GEONET Seddon Aug 16 02:37 5.4 9 MAP I Felt It
PTWC Cook Strait New Zealand Aug 16 02:35 6.8 10 MAP I Felt It
USGS Blenheim, New Zealand Aug 16 02:31 6.8 10 MAP I Felt It
EMSC Cook Strait, New Zealand Aug 16 02:31 6.5 2 MAP I Felt It
USGS Blenheim, New Zealand Aug 16 02:31 6.8 10 MAP I Felt It
GEOFON Cook Strait, New Zealand Aug 16 02:31 6.5 10 MAP I Felt It
USGS Blenheim, New Zealand Aug 16 02:31 6.5 10 MAP I Felt It
  • Karori - It shook and shook. I live in the Wellington area and shaking was severe.... nearly violent. I was at the sick bay because of a black eye when the quake hit. I went to DROP, COVER, HOLD, but I had difficulty walking but I did it anyway. I was frightened but not afraid or scared. I know exactly what to do. Books fell of shelves and computers shook. The power was out for 10 minutes. I just hate experiences like that.
  • GEONET Seddon Aug 16 02:31 6.2 8 MAP I Felt It INFO
  • tauranga - We own a lighting showroom and all the lights started to sway and are still doing so.No big shake mainly just the visual
  • gisborne - was more of a wave than a violent shake - could see the waves outside - freaky! So not shaking but a rolling earthquake.
  • feilding - earthquakes scare me so much i dread everyone
  • Motueka - Earthquake felt for a long time.
  • Marton - Looked down and table was moving, everyone got under their desks and could all feel the shaking.
  • tuahiwi - heard, felt and left lights gently swaying
  • Hokitika - Sitting in a classroom at Kaniere School. Seemed to go on for at least 20-30 seconds.
  • New Plymouth - It seemed very long and the blinds in my office shook violently from side to side. They continue to shake gently every couple of minutes.
  • Whanganui - A sort of Waving circular motion
  • Kaikoura - hard shaking side to side several aftershocks this is NOT NATURAL
  • Tauranga - 2.31pm
  • Havelock North - Wow! it went on for at least 2 minutes rolling like a wave
  • Hamilton, NZ - Felt this in Hamilton twice. One after the other. My office chair was rolling lightly on the floor... made me feel seasick.
  • Palmerston North - Long solid rocking. Felt chair I was sitting on rocking in my office. Went inside the house to hold the TV set in case it fell from table. Trees began moving. Neighbourhood dog began barking and car alarms went off.
  • Hamilton - House was swaying and shaking - thought it was just me getting dizzy (the general consensus of those who felt it here in hamilton).
  • Matamata - pictures moved and felt motion sickness
  • Christchurch - ChCh City COB Quite prominant side to side wobble easily noticed by seeing office desk moving giving the same feeling as going giddy.
  • Auckland - Very weak shake felt around 2.42 pm
  • Murupara - light fittings swinging and motion sickness still after event
  • Motueka - The shaking seemed to go on for quite a lot longer than recent Seddon quakes, but I think it was only for about a minute or so. Shaking was very strong so thought it must be close to surface and very bad in Seddon. No damage but one scared cat.
  • Motueka - Now seem to be getting regular 'shakes' at too frequent intervals. If we can feel them here in Motueka, then it must be pretty bad over the other side in Seddon and Blenheim.
  • Lichfield, Putaruru - Felt slightly off balanced no strong movements though, hanging ornament was swaying
  • Christchurch - Rocking sensation felt in Riccarton for about 30 seconds at around 2:30pm. Felt a few more since but that was definitely an earthquake shake!
  • Dannivirke - We were at assembly and I felt a earthquake I was sooo scared. It was the biggest earthquake I have ever felt!!
  • Stoke - I was in mitre10.co.nz stoke. strong shaking and very un nerving for the people in the shop the iron on the roof was rattling. some check out staff did not feel it.
  • Kirakira - My first experience - felt like a bump rather than a shake or tremor - sudden sharp alarming and ... Over in a millisecond.
  • Cambridge - Swaying motion - pendant lights and fans swaying, water in swimming pool sloshing.
  • Hamilton Central - skeleton hanging on a frame was dancing. Curtains moving
  • Greerton - was in bed ,at first I wondered if it was my imagination. very slight tremor lasted only a few seconds
  • Pukekohe - 16.8.13, 2:31pm - Felt the earth rolling & swaying for several minutes in central Pukekohe this afternoon. The sensation was very similar to being on small boat, to the point of feeling slightly sea sick!
  • WCATWC Cook Strait New Zealand Aug 16 02:31 6.8 9 MAP I Felt It


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    Country where you felt the earthquake
    City/Village where you felt the earthquake
    Street or suburb (area) where you felt the earthquake
    MMI II (Very weak shaking) ?
    People :
    Felt by persons at rest, on upper floors or favorably placed.
    MMI III (Weak shaking) ?
    People :
    Felt indoors; hanging objects may swing, vibration similar to passing of light trucks, duration may be estimated, may not be recognized as an earthquake.
    MMI IV (Light shaking) ?
    People :
    Generally noticed indoors but not outside. Light sleepers may be awakened. Vibration may be likened to the passing of heavy traffic, or to the jolt of a heavy object falling or striking the building.
    Fittings :
    Doors and windows rattle. Glassware and crockery rattle. Liquids in open vessels may be slightly disturbed. Standing motorcars may rock.
    Structures :
    Walls and frames of buildings, and partitions and suspended ceilings in commercial buildings, may be heard to creak.
    MMI V (Moderate shaking) ?
    People :
    Generally felt outside, and by almost everyone indoors. Most sleepers awakened. A few people alarmed.
    Fittings :
    Small unstable objects are displaced or upset. Some glassware and crockery may be broken. Hanging pictures knock against the wall. Open doors may swing. Cupboard doors secured by magnetic catches may open. Pendulum clocks stop, start, or change rate.
    Structures :
    Some large display windows cracked. A few earthenware toilet fixtures cracked.
    MMI VI (Strong shaking) ?
    People Felt by all. People and animals alarmed. Many run outside. Difficulty experienced in walking steadily.
    Fittings :
    Objects fall from shelves. Pictures fall from walls. Some furniture moved on smooth floors, some unsecured free-standing fireplaces moved. Glassware and crockery broken. Very unstable furniture overturned. Small church and school bells ring. Appliances move on bench or table tops. Filing cabinets or "easy glide" drawers may open (or shut).
    Structures :
    Slight damage to buildings with low standard. Some stucco or cement plaster falls. Large display windows broken. Damage to a few weak domestic chimneys, some may fall.
    Environment :
    Trees and bushes shake, or are heard to rustle. Loose material may be dislodged from sloping ground, e.g. existing slides, talus slopes, shingle slides.
    MMI VII (Very strong shaking) ?
    People
    General alarm. Difficulty experienced in standing. Noticed by motorcar drivers who may stop.
    Fittings :
    Large bells ring. Furniture moves on smooth floors, may move on carpeted floors. Substantial damage to fragile contents of buildings.
    Structures :
    Unreinforced stone and brick walls cracked. Low standard buildings cracked with some minor masonry falls. A few instances of damage to buildings of ordinary workmanship. Unbraced parapets, unbraced brick gables, and architectural ornaments fall. Roofing tiles, especially ridge tiles may be dislodged. Many unreinforced domestic chimneys damaged, often falling from roof-line. Water tanks Type I burst. A few instances of damage to brick veneers and plaster or cement-based linings. Unrestrained water cylinders (hot-water cylinders) may move and leak. Some common windows cracked. Suspended ceilings damaged.
    Environment :
    Water made turbid by stirred up mud. Small slides such as falls of sand and gravel banks, and small rock-falls from steep slopes and cuttings. Instances of settlement of unconsolidated or wet, or weak soils. Some fine cracks appear in sloping ground. A few instances of liquefaction (i.e. small water and sand ejections).
    MMI VIII (Severe shaking) ?
    People Alarm may approach panic. Steering of motorcars greatly affected. Structures : Low standard buildings heavily damaged, some collapse. ordinary workmanship buildings damaged, some with partial collapse. Reinforced masonry or concrete buildings damaged in some cases. A few instances of damage to buildings and bridges designed and built to resist earthquakes. Monuments and pre-1976 elevated tanks and factory stacks twisted or brought down. Some pre-1965 infill masonry panels damaged. A few post-1980 brick veneers damaged. Decayed timber piles of houses damaged. Houses not secured to foundations may move. Most unreinforced domestic chimneys damaged, some below roof-line, many brought down. Environment : Cracks appear on steep slopes and in wet ground. Small to moderate slides in roadside cuttings and unsupported excavations. Small water and sand ejections and localized lateral spreading adjacent to streams, canals, lakes, etc.
    MMI IX (Violent shaking) ?
    Structures Many low standard buildings destroyed. Ordinary workmanship buildings heavily damaged, some collapse. Reinforced masonry or concrete buildings damaged, some with partial collapse. Buildings and bridges designed and built to resist earthquakes damaged in some cases, some with flexible frames seriously damaged. Damage or permanent distortion to some buildings and bridges, designed and built to normal use standards. Houses not secured to foundations shifted off. Brick veneers fall and expose frames. Environment : Cracking of ground conspicuous. Landsliding general on steep slopes. Liquefaction effects intensified and more widespread, with large lateral spreading and flow sliding adjacent to streams, canals, lakes, etc.
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