Moderate shallow quake in Central California + "I Have Felt It reports"

Earthquake overview : A moderate but very shallow and thus moderately dangerous earthquake rattled through Central California just after midnight. Luckily in a scarcely populated area.

We ask people who have felt this earthquake to share their information with our many readers (also from your area). Please use the "I Have Felt it" form below.

UPDATE 30/08 - 06:53 LT :  Another weak aftershock measuring 2.6 at 7 km (4 miles) NW (326°) from Pinnacles, CA and 24 km (15 miles) ENE (70°) from Gonzales, CA. the earth keeps moving.
The pattern of the many small quakes at various locations along the San Andreas fault has to be noticed. This morning weak 2.9 M earthquake almost below San Fransisco was another sign of the activity of the fault.

UPDATE 28/08 - 18:13 UTC : Aftershocks on August 28 UTC :
M 3.0      2011/08/28 17:04 Depth 6.9 km
M 2.7      2011/08/28 12:17 Depth 7.6 km
M 3.0      2011/08/28 03:03 Depth 5.6 km

UPDATE 10:00 UTC : Since the mainshock of 4.8, we have recorded 5 aftershocks measuring :  3.6, 2.6, 3.3, 2.7 and 2.5. Epicenters in

UPDATE : We can only notice an increase in activity along the Central California San Andreas fault (red line on map) and this in 2 locations with multiple earthquakes. Let us hope it stops here.

 

Detail of earthquakes on August 26 and 27 along the San Andreas fault. The biggest dots are +4, the smallest +1

UPDATE : the Pine Rock Fault Zone is very close to the greater San Andreas fault line

Landscape in the greater earthquake epicenter area - Panoramio image courtesy Carolyn - http://www.panoramio.com/photo/32600462

UPDATE : In a radius of 10 miles around the current epicenter, we notices 5 other earthquakes.
M 3.1, August 15, 2011 08:20:27 UTC Depth: 4.07 km (2.53 mi)
M 3.1, July 3, 2011 18:56:55 UTC Depth:    11.30 km (7.02 mi)
M 3.0, July 6, 2011 07:19:58 UTC Depth:    7.05 km (4.38 mi)
M 3.8, July 6, 2011 07:18:52 UTC Depth:    7.59 km (4.72 mi)
M 3.1, June 14, 2011 19:05:28 UTC Depth: 6.10 km (3.79 mi)

UPDATE : The location of occurrence is right on the San Adreas Fault and close to the Pine Rock Fault zone, responsible for a number of moderate quakes since the beginning of June 2011.

UPDATE : The earthquake has been felt as far as San Fransisco, Fresno and Templeton

UPDATE : the epicenter is very close to Pinnacles National Monument. The Monument's namesakes are the eroded leftovers of half of an extinct volcano.

UPDATE : The area has been hit by several shocks the last couple of weeks, this is however the strongest since the sequence started.

UPDATE : Luckily, the direct epicenter area is very scarcely populated and is at least 20 km from the farming Gonzales valley.

UPDATE : The earthquake occurred very close to road 25 which links San Benito to Ridgemark.

UPDATE : Maximum calculated MMI is V (moderate shaking). It will be experienced by 57 people , a IV MMI by nearly 35,000 people. A weak III MMI shaking by nearly a million people

UPDATE : The earthquake was first reported as a 4.8 earthquake.

"I Have Felt It" reports as received by Earthquake-Report.com
MMI values (if indicated) after the text (III: Weak shaking, IV Light shaking, V Moderate shaking, VI Strong shaking, VII Very Strong shaking)
Carmel Valley, CA - Weak shaking MMI III
95005, CA - Light shaking indicated - MMI IV
Salinas, CA - Dizzy - III
Carmel Valley, CA - Shook the house strongly enough to creaking and wake me from sleep.  Lasted about 10 seconds.  No pictures moved or things broken.  Too late to check the foundation, but no obvious inside damage. - V MMI
Santa Cruz, CA - Just enough to wake me up - III
Santa Cruz, CA - Light shaking indicated - MMI IV
Carmel Valley, CA - Shook the house strongly enough to creaking and wake me from sleep.  Lasted about 10 seconds.  No pictures moved or things broken.  Too late to check the foundation, but no obvious inside damage. - V
Carmel Valley, CA - III indicated (weak shaking).
Monterey, Forest Ridge Rd, 93940 - Sitting on the couch watching tv and the couch started shaking and jumping. Probably only for about 5-10secs. We live on a slope though, with half of our apartment supported by 20ft columns -- so this probably increased the magnitude of our experience. - MMI V
Monterey, CA - Was lying in bed when the bed started shaking for about 8 seconds, no audible noise from surroundings. - MMI IV
Santa Cruz, CA - Very mild and short - MMI III
Kings Canyon National Park - Bed was shaking in our cabin in kings canyon national park around midnight of the 25th turning to the 26th. - MMI IV

Most important Earthquake Data:
Magnitude : 4.6
UTC Time : Saturday, August 27, 2011 at 07:18:21 UTC
Local time at epicenter : Saturday, August 27, 2011 at 12:18:21 AM at epicenter
Depth (Hypocenter) : 7.6 km
Geo-location(s) :
7 km (4 miles) NNW (330°) from Pinnacles, CA
21 km (13 miles) NE (38°) from Soledad, CA
35 km (22 miles) SE (146°) from Hollister, CA
105 km (65 miles) SE (143°) from San Jose City Hall, CA

Links to important maps
USGS Did You Feel It Map
Google satellite map of the area showing the kind of terrain the earthquake took place
USGS Human impact map
USGS historic earthquakes map
USGS Seismic hazard map

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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

Comments

  1. Thanks for posting these earthquakes and keeping us posted. I really appreciate all you do.