Minor earthquake, 3.09 mag was detected near San Ramon in CA

A minor earthquake magnitude 3.09 (ml/mb) has struck on Wednesday, 5 kilometers (3 miles) from San Ramon in CA. The earthquake occurred at a depth of 8.8100004196167 km (5 miles). Exact location, longitude -121.94083404541° West, latitude 37.748001098633° North, depth = 8.8100004196167 km. Date and time of earthquake in UTC/GMT: 24/12/25 / 2025-12-24 19:36:54 / December 24, 2025 @ 7:36 pm. The temblor was picked up at 19:36:54 / 7:36 pm (local time epicenter). Id of earthquake: nc75285821. Event ids that are associated: nc75285821.

Earthquake epicenter was 46 km (28 miles) from San Jose (c. 945 900 pop), 42 km (26 miles) from San Francisco (c. 805 200 pop), 30 km (18 miles) from Oakland (c. 390 700 pop), 62 km (38 miles) from Stockton (c. 291 700 pop), 23 km (14 miles) from Fremont (c. 214 100 pop). 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 Galt, San Martin, Boyes Hot Springs.

Earthquakes 3.0 to 4.0 are often felt, but only causes minor damage. In the past 24 hours, there have been one, in the last 10 days fourteen, in the past 30 days twenty-seven and in the last 365 days sixty-eight earthquakes of magnitude 3.0 or greater that has struck near. Each year there are an estimated 130,000 minor earthquakes in the world.

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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. Read more about the earthquake, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 5 km SE of San Ramon, CA. This information comes from the USGS Earthquake Notification Service.

Boyes Hot Springs CA Fremont Galt Oakland San Francisco San Jose San Martin San Ramon Stockton United States

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Parameter	Value	Description
Magnitude	3.09 mb	The magnitude for the event.
Longitude	-121.94083404541° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	37.748001098633° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	8.8100004196167 km	Depth of the event in kilometers.
Place	5 km SE of San Ramon, CA	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2025-12-24 19:36:54	Time when the event occurred. UTC/GMT
Updated	2025-12-24 19:38:58	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	147	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	72	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	0.09884	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	24	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	nc75285821	Id of event.
Event Code	75285821	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,nc75285821,	A comma-separated list of event ids that are associated to an event.

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Minor earthquake, 3.09 mag was detected near San Ramon in CA

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