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Minor earthquake: M2.85 quake has struck near San Ramon in California



Earthquake location 37.7921677S, -121.989502WA minor earthquake magnitude 2.85 (ml/mb) strikes 1 kilometers (1 miles) from San Ramon in California on Monday. Exact location of event, depth 1.32 km, -121.989502° West, 37.7921677° North. The 2.85-magnitude earthquake has occurred at 21:33:03 / 9:33 pm (local time epicenter). Event id: nc72541090. Ids that are associated to the earthquake: nc72541090. The earthquake was roughly at a depth of 1.32 km (1 miles). Exact time and date of event in UTC/GMT: 20/10/15 / 2015-10-20 04:33:03 / October 20, 2015 @ 4:33 am.

Close country/countries, United States (c. 310 233 000 pop) (That might be effected). Closest city/cities or villages, with min 5000 pop, to hypocenter/epicentrum was Ripon, Petaluma, Dixon. Epicenter of the event was 51 km (32 miles) from San Jose (c. 945 900 pop), 38 km (24 miles) from San Francisco (c. 805 200 pop), 25 km (15 miles) from Oakland (c. 390 700 pop), 64 km (40 miles) from Stockton (c. 291 700 pop), 27 km (17 miles) from Fremont (c. 214 100 pop).

Each year there are an estimated 1,300,000 minor earthquakes in the world. In the past 24 hours, there have been two, in the last 10 days six, in the past 30 days six and in the last 365 days twenty-four earthquakes of magnitude 3.0 or greater that has struck near. Earthquakes 2.5 to 2.9 are often felt, but only causes minor damage.

Did you feel the quake?

How did you respond? Did any furniture slide, topple over, or become displaced? Leave a comment or report about activity, shaking and damage at your home, city and country. This data comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, that has occurred near: 1 km NW of San Ramon, California.

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More information

Parameter Value Description
Magnitude 2.85 mb The magnitude for the event.
Longitude -121.989502° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 37.7921677° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 1.32 km Depth of the event in kilometers.
Place 1km NW of San Ramon, California Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2015-10-20 04:33:03 Time when the event occurred. UTC/GMT
Updated 2015-10-20 04:41:13 Time when the event was most recently updated. UTC/GMT
Timezone offset -420 Timezone offset from UTC in minutes at the event epicenter.
Felt 85 The total number of felt reports
CDI 3 The maximum reported intensity for the event.
MMI The maximum estimated instrumental intensity for the event.
Alert Level The alert level from the PAGER earthquake impact scale. Green, Yellow, Orange or Red.
Review Status automatic Indicates whether the event has been reviewed by a human.
Tsunami 0 This flag is set to "1" for large events in oceanic regions and "0" otherwise. The existence or value of this flag does not indicate if a tsunami actually did or will exist.
SIG 150 A number describing how significant the event is. Larger numbers indicate a more significant event.
Network nc The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources ,nc, A comma-separated list of network contributors.
Number of Stations Used 58 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0.06308 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.26 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 51 The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type md The method or algorithm used to calculate the preferred magnitude for the event.
Event Type earthquake Type of seismic event.
Event ID nc72541090 Id of event.
Event Code 72541090 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,nc72541090, A comma-separated list of event ids that are associated to an event.

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