Minor earthquake, 2.8 mag was detected near San Ramon in CA

A minor earthquake with magnitude 2.8 (ml/mb) was reported 4 kilometers (2 miles) from San Ramon in CA on Monday. All ids that are associated to the event: nc75280151. Unique identifier: nc75280151. The 2.8-magnitude earthquake has occurred at 06:46:53 / 6:46 am (local time epicenter). Exact location of earthquake, longitude -121.93482971191 West, latitude 37.758834838867 North, depth = 7.7800002098083 km. The epicenter of the earthquake was roughly 7.7800002098083 km (5 miles) below the earth’s surface. Global date and time of event UTC/GMT: 15/12/25 / 2025-12-15 06:46:53 / December 15, 2025 @ 6:46 am.

Nearest city/cities or towns, with min 5000 pop, to epicentrum/hypocenter was Dixon, Ben Lomond, Salida. Nearby country/countries, United States (c. 310 233 000 pop) (That might be effected). Epicenter of the earthquake was 47 km (29 miles) from San Jose (c. 945 900 pop), 43 km (26 miles) from San Francisco (c. 805 200 pop), 30 km (19 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).

In the past 24 hours, there have been four, in the last 10 days eight, in the past 30 days twenty and in the last 365 days fifty-eight earthquakes of magnitude 3.0 or greater that have been detected in the same area. 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.

Did you feel the quake?

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, Distances, Seismometer information, Date-Time, Parameters, Location and details about this quake, that has struck: 4 km ESE of San Ramon, CA. This data comes from the USGS Earthquake Notification Service.

Ben Lomond CA Dixon Fremont Oakland Salida San Francisco San Jose San Ramon Stockton United States

More information

Parameter	Value	Description
Magnitude	2.8 mb	The magnitude for the event.
Longitude	-121.93482971191° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	37.758834838867° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	7.7800002098083 km	Depth of the event in kilometers.
Place	4 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	2025-12-15 06:46:53	Time when the event occurred. UTC/GMT
Updated	2025-12-15 06:52:53	Time when the event was most recently updated. UTC/GMT
Timezone offset		Timezone offset from UTC in minutes at the event epicenter.
Felt	18	The total number of felt reports
CDI	3.8	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	127	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	39	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	0.1052	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	40	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	nc75280151	Id of event.
Event Code	75280151	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,nc75280151,	A comma-separated list of event ids that are associated to an event.

Earthquakes today

Current and latest world earthquakes breaking news, activity and articles today

Minor earthquake, 2.8 mag was detected near San Ramon in CA

Did you feel the quake?

More information

Leave a ReplyCancel reply

Follow us!

Tsunami videos

Categories

Information