Minor earthquake: M3.06 quake has struck near San Ramon in CA

A minor earthquake with magnitude 3.06 (ml/mb) was detected on Tuesday, 5 kilometers (3 miles) from San Ramon in CA. Global time and date of event 16/12/25 / 2025-12-16 13:53:26 / December 16, 2025 @ 1:53 pm UTC/GMT. Unique identifier: nc75280786. Ids that are associated to the event: nc75280786. The temblor was picked up at 13:53:26 / 1:53 pm (local time epicenter). Exact location, longitude -121.94100189209° West, latitude 37.751667022705° North, depth = 8.4099998474121 km. The earthquake occurred at a depth of 8.4099998474121 km (5 miles).

Epicenter of the event was 46 km (29 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). Close country/countries, United States (c. 310 233 000 pop) (That might be effected). Closest city/cities/towns to epicentrum/hypocenter was Boyes Hot Springs, Scotts Valley, Patterson (min 5000 pop).

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 nine, in the past 30 days twenty-one and in the last 365 days fifty-nine 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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Were you asleep? Was it difficult to stand and/or walk? Leave a comment or report about shaking, activity and damage at your city, home 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: 5 km SE of San Ramon, CA.

Boyes Hot Springs CA Fremont Oakland Patterson San Francisco San Jose San Ramon Scotts Valley Stockton United States

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Parameter	Value	Description
Magnitude	3.06 mb	The magnitude for the event.
Longitude	-121.94100189209° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	37.751667022705° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	8.4099998474121 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	2025-12-16 13:53:26	Time when the event occurred. UTC/GMT
Updated	2025-12-16 13:55:31	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	144	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	81	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	0.09915	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	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	nc75280786	Id of event.
Event Code	75280786	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,nc75280786,	A comma-separated list of event ids that are associated to an event.

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Minor earthquake: M3.06 quake has struck near San Ramon in CA

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