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Earthquake breaking news, Minor World Earthquakes Magnitude -3.9

Minor earthquake, 3.9688 mag was detected near San Martin in California


Earthquake location 37.1615S, -121.5409WA minor earthquake magnitude 3.9688 (ml/mb) strikes 10 kilometers (6 miles) from San Martin in California on Tuesday. The temblor was picked up at 14:58:39 / 2:58 pm (local time epicenter). Exact location of earthquake, -121.5409° West, 37.1615° North, depth 9 km. Exact time and date of earthquake 15/12/20 / 2020-12-15 14:58:39 / December 15, 2020 @ 2:58 pm UTC/GMT. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Event id: ew1608044319. Ids that are associated to the earthquake: ew1608044319. The epicenter of the earthquake was roughly 9 km (6 miles) below the earth’s surface.

Epicenter of the earthquake was 37 km (23 miles) from San Jose (c. 945 900 pop), 58 km (36 miles) from Fremont (c. 214 100 pop), 72 km (45 miles) from Modesto (c. 201 200 pop), 55 km (34 miles) from Salinas (c. 150 400 pop), 74 km (46 miles) from Hayward (c. 144 200 pop), 50 km (31 miles) from Sunnyvale (c. 140 100 pop). Closest city/cities or villages, with min 5000 pop, to hypocenter/epicentrum was Millbrae, Alamo, Waterford. Close country/countries that might be effected, United States (c. 310 233 000 pop).

In the past 24 hours, there have been three, in the last 10 days three, in the past 30 days four and in the last 365 days fourty-five earthquakes of magnitude 3.0 or greater that have been detected nearby. Each year there are an estimated 130,000 minor earthquakes in the world. Earthquakes 3.0 to 4.0 are often felt, but only causes minor damage.

Did you feel it?

Were you asleep? Was it difficult to stand and/or walk? Leave a comment or report about shaking, activity and damage at your city, home 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: 10 km NE of San Martin, California.

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More information

Parameter Value Description
Magnitude 3.9688 mb The magnitude for the event.
Longitude -121.5409° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 37.1615° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 9 km Depth of the event in kilometers.
Place 10 km NE of San Martin, California Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2020-12-15 14:58:39 Time when the event occurred. UTC/GMT
Updated 2020-12-15 15:01:34 Time when the event was most recently updated. UTC/GMT
Timezone offset Timezone offset from UTC in minutes at the event epicenter.
Felt 5 The total number of felt reports
CDI 3.1 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 244 A number describing how significant the event is. Larger numbers indicate a more significant event.
Network ew The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources ,ew, A comma-separated list of network contributors.
Number of Stations Used 12 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type mw The method or algorithm used to calculate the preferred magnitude for the event.
Event Type earthquake Type of seismic event.
Event ID ew1608044319 Id of event.
Event Code 1608044319 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,ew1608044319, A comma-separated list of event ids that are associated to an event.

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