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Minor earthquake: M2.81 quake has struck near Danville in CA

Posted by admin on February 23, 2018 0 Comments

Earthquake location 37.8246651S, -121.9788361WA minor earthquake with magnitude 2.81 (ml/mb) was detected on Friday, 2 kilometers (1 miles) from Danville in CA. The epicenter was at a depth of 7.13 km (4 miles). Exact location, longitude -121.9788361° West, latitude 37.8246651° North, depth = 7.13 km. Id of earthquake: nc72974776. Event ids that are associated: nc72974776. The temblor was picked up at 12:21:59 / 12:21 pm (local time epicenter). Exact time and date of event in UTC/GMT: 23/02/18 / 2018-02-23 20:21:59 / February 23, 2018 @ 8:21 pm.

Epicenter of the event was 54 km (34 miles) from San Jose (c. 945 900 pop), 39 km (24 miles) from San Francisco (c. 805 200 pop), 26 km (16 miles) from Oakland (c. 390 700 pop), 62 km (39 miles) from Stockton (c. 291 700 pop), 31 km (19 miles) from Fremont (c. 214 100 pop). Nearest cities/city/towns to hypocenter/epicentrum was Galt, Ripon, Petaluma (min 5000 pop). Country/countries that might be effected, United States (c. 310 233 000 pop).

In the past 24 hours, there have been two, in the last 10 days five, in the past 30 days six and in the last 365 days thirty-seven earthquakes of magnitude 3.0 or greater that was reported nearby. There are an estimated 1,300,000 minor earthquakes in the world each year. Earthquakes 2.5 to 2.9 are often felt, but only causes minor damage.

Questions or comments?

Did objects rattle, topple over, or fall off shelves? Leave a comment or report about activity, shaking and damage at your home, country and city. This information comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Date-Time, Location, Distances, Parameters and details about this quake, recorded: 2 km E of Danville, CA.

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More information

Parameter Value Description
Magnitude 2.81 mb The magnitude for the event.
Longitude -121.9788361° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 37.8246651° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 7.13 km Depth of the event in kilometers.
Place 2km E of Danville, CA Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2018-02-23 20:21:59 Time when the event occurred. UTC/GMT
Updated 2018-02-23 20:26:03 Time when the event was most recently updated. UTC/GMT
Timezone offset -480 Timezone offset from UTC in minutes at the event epicenter.
Felt 11 The total number of felt reports
CDI 4.8 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 127 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 47 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0.06717 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.09 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 63 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 nc72974776 Id of event.
Event Code 72974776 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,nc72974776, A comma-separated list of event ids that are associated to an event.

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