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Earthquake breaking news, Minor World Earthquakes Magnitude -3.9

Minor earthquake 3.34 mag, 4 km NE of Alamo, CA

Earthquake location 37.8740005S, -121.9901657WA minor earthquake with magnitude 3.34 (ml/mb) was reported 4 kilometers (2 miles) from Alamo in CA on Monday. The temblor was reported at 03:55:02 / 3:55 am (local time epicenter). Date and time of earthquake in UTC/GMT: 30/04/18 / 2018-04-30 11:55:02 / April 30, 2018 @ 11:55 am. Event ids that are associated to the earthquake: nc73008716. Id of event: nc73008716. The epicenter of the earthquake was roughly 6.75 km (4 miles) below the earth’s surface. Exact location of event, depth 6.75 km, -121.9901657° West, 37.8740005° North.

Country/countries that might be effected, United States (c. 310 233 000 pop). Nearest city/cities or towns, with min 5000 pop, to epicentrum/hypocenter was Salida, Saint Helena, Rohnert Park. Epicenter of the event was 60 km (37 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), 36 km (23 miles) from Fremont (c. 214 100 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 thirty-two earthquakes of magnitude 3.0 or greater that have been detected nearby. Each year there are an estimated 130,000 minor quakes in the world. Earthquakes 3.0 to 4.0 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. The information in this article comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, detected near: 4 km NE of Alamo, CA.

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More information

Parameter Value Description
Magnitude 3.34 mb The magnitude for the event.
Longitude -121.9901657° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 37.8740005° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 6.75 km Depth of the event in kilometers.
Place 4km NE of Alamo, CA Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2018-04-30 11:55:02 Time when the event occurred. UTC/GMT
Updated 2018-04-30 11:57:44 Time when the event was most recently updated. UTC/GMT
Timezone offset -480 Timezone offset from UTC in minutes at the event epicenter.
Felt 4 The total number of felt reports
CDI 2 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 172 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 68 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0.07601 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.14 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 66 The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type ml The method or algorithm used to calculate the preferred magnitude for the event.
Event Type earthquake Type of seismic event.
Event ID nc73008716 Id of event.
Event Code 73008716 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,nc73008716, A comma-separated list of event ids that are associated to an event.

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