More than 50 million people have felt today's 6.2 magnitude aftershock in Honshu, Japan

Earthquake overview : A very strong 6.2 magnitude aftershock struck on 17:00 (05:00 PM) local Japanese Time approx. 70 km out of the Honshu coast. A maximum moderate shaking was experienced, but tens of millions of people have felt this aftershock and are once again reminded at the destructive March earthquake and tsunami.
"I have Felt it" Reports --> see below + Let us know "how you have felt this earthquake"
To read the full story as it happened, we advise our readers to start at the lower part of the page (earthquake data).

Keep this page open or return regularly as we will be back with more details when they become available

Update : The main problem with people feeling an earthquake is that they never know whether is is close by or far away from them. A logical result of this, is that people will try to find information asap and start calling and txt'ing to each other which often result in congested lines.

Update : Earthquakes from this intensity do NOT cause any problems for the nuclear power plants .

Update : A max. 4 JMA intensity earthquake cannot be considered as dangerous. We trust on the Japanese way of handling dangerous earthquakes and based on our experience at least a 5+ is needed to create damage and eventually injuries (even most of the 5+ intensity earthquakes are not resulting in damage or injuries).  So, we do not expect any problems from this one.

Update :  Data from other seismological agencies :
JMA (local Japan agency) : 6.2 @ 10 km depth
USGS : 6.2 @ 10 km depth
EMSC : 6.0 @ 40 km depth
GFZ : 6.2 @ 26 km depth

Max. JMA intensity 4 (on a scale from 0 to 7).
JMA has reported a magnitude of 6.2 at a shallow depth of 10 km.
The earthquake occurred far enough out of the Japanese coast to be harmless.
There is NO tsunami warning or advisory in place for this earthquake

This is an aftershock of the massive destructive earthquake earlier this year.
I Have Felt It reports out of Tokyo report a "Light MMI IV" shaking.
USGS has calculated that 5,112,000 people will have experienced a moderate MMI V shaking. 46,430,000 a light shaking

  • "I Have Felt It" reports as received by

MMI values (if indicated) after the text (III: Weak shaking, IV Light shaking, V Moderate shaking, VI Strong shaking, VII Very Strong shaking)
Tokyo : Light shaking indicated
Tokyo, Narita Airport: I felt it at Narita airport. My feet shook from side to side but that`s it. I wasn`t even sure it was one at first!
Tokyo: mild shaking at approx 16.50 local time
Ikebukuro, Tokyo : Was in my 10th floor office. Very sudden acceleration. Walls creaked. Moved for about 30 seconds before settling to the recovery sway. Had us nervous but no real problems
Tsuchiura: Experienced light shaking at 5:27am and 5:33am local time lasting less than 30 seconds each time

EMSC Felt reports
Yokusuka (191 km from the epicenter): It was long, 15 to 20 seconds.
Taito (191 km from the epicenter) : first earthquake we have experienced. room on 6th floor of hotel felt like it was wobbling.

Most important Earthquake Data:
Magnitude : 6.2
UTC Time : Thursday, September 15, 2011 at 08:00:07 UTC
Local time at epicenter : Thursday, September 15, 2011 at 05:00:07 PM at epicenter
Depth (Hypocenter) : 10 km
Geo-location(s) :
74 km (46 miles) E (96°) from Mito, Honshu, Japan
94 km (58 miles) SSE (157°) from Iwaki, Honshu, Japan

Links to important maps
USGS Did You Feel It Map
Google satellite map showing the epicenter and the surrounding area.
Historic earthquakes map
Seismic hazard map
Shaking map

Focal mechanism report
Human impact map
GDACS earthquake report

QuakeSOS+ and QuakeSOS free are iPhone applications developed by Armand Vervaeck, the founder of Earthquake Report. The Application simplifies immediate group communication to friends and family members (with your exact GPS location) and is feeding the users with Earthquake Report news. The 0.99 US$ QuakeSOS+ version will support the activities of SOS Earthquakes.

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I did feel it – Ik heb het gevoeld – Το έκανα αισθάνεται – Yo lo siento – 我的确感到了 – 私はそれを感じていました- Ich habe es gefühlt – Bunu hissediyorum yaptı – لم أشعر أنه