Minor earthquake 3.15 mag, 3 km ESE of San Ramon, CA

A minor earthquake magnitude 3.15 (ml/mb) has struck on Sunday, 3 kilometers (2 miles) from San Ramon in CA. Exact time and date of event in UTC/GMT: 09/11/25 / 2025-11-09 18:42:25 / November 9, 2025 @ 6:42 pm. Exact location of earthquake, -121.9451675415° West, 37.762664794922° North, depth 8.5600004196167 km. Event ids that are associated to the earthquake: nc75261036. Id of event: nc75261036. The earthquake occurred at a depth of 8.5600004196167 km (5 miles) below the earth’s surface. The temblor was reported at 18:42:25 / 6:42 pm (local time epicenter).

Nearest cities/city/towns to hypocenter/epicentrum was Petaluma, Scotts Valley, Patterson (min 5000 pop). Event epicenter was 47 km (29 miles) from San Jose (c. 945 900 pop), 42 km (26 miles) from San Francisco (c. 805 200 pop), 29 km (18 miles) from Oakland (c. 390 700 pop), 61 km (38 miles) from Stockton (c. 291 700 pop), 24 km (15 miles) from Fremont (c. 214 100 pop). Country/countries that might be effected, United States (c. 310 233 000 pop).

There are an estimated 130,000 minor quakes in the world each year. In the past 24 hours, there have been five, in the last 10 days six, in the past 30 days eight and in the last 365 days thirty-six earthquakes of magnitude 3.0 or greater that has struck near. Earthquakes 3.0 to 4.0 are often felt, but only causes minor damage.

Did you feel anything?

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. This information comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Date-Time, Location, Distances, Parameters and details about this quake, recorded: 3 km ESE of San Ramon, CA.

CA Fremont Oakland Patterson Petaluma San Francisco San Jose San Ramon Scotts Valley Stockton United States

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Parameter	Value	Description
Magnitude	3.15 mb	The magnitude for the event.
Longitude	-121.9451675415° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	37.762664794922° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	8.5600004196167 km	Depth of the event in kilometers.
Place	3 km ESE 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	2025-11-09 18:42:25	Time when the event occurred. UTC/GMT
Updated	2025-11-09 18:47:54	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	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	153	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	74	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	0.02637	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.08 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	27	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	nc75261036	Id of event.
Event Code	75261036	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,nc75261036,	A comma-separated list of event ids that are associated to an event.

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Minor earthquake 3.15 mag, 3 km ESE of San Ramon, CA

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