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

A minor earthquake magnitude 2.81 (ml/mb) strikes 101 km W of Petrolia, CA (63 miles) on Thursday. Global date and time of event UTC/GMT: 04/12/25 / 2025-12-04 13:07:45 / December 4, 2025 @ 1:07 pm. The 2.81-magnitude earthquake was detected at 13:07:45 / 1:07 pm (local time epicenter). Id of earthquake: nc75274241. Event ids that are associated: nc75274241. The earthquake occurred at a depth of 8.6000003814697 km (5 miles) below the earth’s surface. Exact location of earthquake, -125.47183227539° West, 40.377166748047° North, depth 8.6000003814697 km.

In the past 24 hours, there have been 0, in the last 10 days one, in the past 30 days six and in the last 365 days two hundred and ninety-six 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.

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How did you react? Was there any damage to buildings? Leave a comment or report about shaking, activity and damage at your home, city and country. 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: 101 km W of Petrolia, CA.

CA Petrolia

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Parameter	Value	Description
Magnitude	2.81 mb	The magnitude for the event.
Longitude	-125.47183227539° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	40.377166748047° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	8.6000003814697 km	Depth of the event in kilometers.
Place	101 km W of Petrolia, CA	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2025-12-04 13:07:45	Time when the event occurred. UTC/GMT
Updated	2025-12-04 13:09:16	Time when the event was most recently updated. UTC/GMT
Timezone offset		Timezone offset from UTC in minutes at the event epicenter.
Felt		The total number of felt reports
CDI		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	121	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	23	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	0.8784	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.31 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	286	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	nc75274241	Id of event.
Event Code	75274241	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,nc75274241,	A comma-separated list of event ids that are associated to an event.

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

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