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Earthquake breaking news, Minor World Earthquakes Magnitude -3.9

Minor earthquake 3.21 mag, 6 km WSW of St. Helena, CA

Earthquake location 38.4794998S, -122.5384979WA minor earthquake magnitude 3.21 (ml/mb) has struck on Thursday, 6 kilometers (4 miles) from St. Helena in CA. Event id: nc73531186. Ids that are associated to the earthquake: nc73531186. The epicenter was at a depth of 9.97 km (6 miles). Exact location of event, depth 9.97 km, -122.5384979° West, 38.4794998° North. The temblor was picked up at 15:53:28 / 3:53 pm (local time epicenter). Global time and date of event 04/03/21 / 2021-03-04 15:53:28 / March 4, 2021 @ 3:53 pm UTC/GMT.

Epicenter of the earthquake was 79 km (49 miles) from San Francisco (c. 805 200 pop), 79 km (49 miles) from Oakland (c. 390 700 pop), 16 km (10 miles) from Santa Rosa (c. 167 800 pop), 71 km (44 miles) from Concord (c. 122 100 pop), 48 km (30 miles) from Vallejo (c. 115 900 pop). Closest city/cities or villages, with min 5000 pop, to hypocenter/epicentrum was Moraga, Clayton, San Francisco. Close country/countries, United States (c. 310 233 000 pop) (That might be effected).

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

Did you feel it?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity 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: 6 km WSW of St. Helena, CA.

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More information

Parameter Value Description
Magnitude 3.21 mb The magnitude for the event.
Longitude -122.5384979° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 38.4794998° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 9.97 km Depth of the event in kilometers.
Place 6km WSW of St. Helena, CA Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2021-03-04 15:53:28 Time when the event occurred. UTC/GMT
Updated 2021-03-04 15:59:41 Time when the event was most recently updated. UTC/GMT
Timezone offset Timezone offset from UTC in minutes at the event epicenter.
Felt 3 The total number of felt reports
CDI 4.2 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 reviewed 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 160 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 65 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0.1115 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.13 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 80 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 nc73531186 Id of event.
Event Code 73531186 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,nc73531186, A comma-separated list of event ids that are associated to an event.

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