Light earthquake, 4.2 mag was detected near Rohnert Park in California

A light earthquake magnitude 4.2 (ml/mb) has occurred on Sunday, 5 kilometers (3 miles) from Rohnert Park in California. Date and time of earthquake in UTC/GMT: 14/12/25 / 2025-12-14 23:30:44 / December 14, 2025 @ 11:30 pm. Exact location of earthquake, longitude -122.652 West, latitude 38.368 North, depth = 13 km. A tsunami warning has been issued near Rohnert Park in California (Does not indicate if a tsunami actually did or will exist). All ids that are associated to the event: at00t7a9b8, ew1765755040. Unique identifier: at00t7a9b8. The temblor was reported at 23:30:44 / 11:30 pm (local time epicenter). The earthquake occurred at a depth of 13 km (8 miles).

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 Hayward, Oakley, Hillsborough. The epicenter was 69 km (43 miles) from San Francisco (c. 805 200 pop), 71 km (44 miles) from Oakland (c. 390 700 pop), 10 km (6 miles) from Santa Rosa (c. 167 800 pop), 92 km (57 miles) from Hayward (c. 144 200 pop), 69 km (43 miles) from Concord (c. 122 100 pop), 45 km (28 miles) from Vallejo (c. 115 900 pop).

Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. In the past 24 hours, there have been one, in the last 10 days five, in the past 30 days sixteen and in the last 365 days sixty earthquakes of magnitude 3.0 or greater that have been detected nearby. There are an estimated 13,000 light earthquakes in the world each year.

Questions or comments?

How did you respond? Did any furniture slide, topple over, or become displaced? Leave a comment or report about activity, shaking and damage at your home, city and country. Read more about the earthquake, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 5 km NE of Rohnert Park, California. This information comes from the USGS Earthquake Notification Service.

California Concord Hayward Hillsborough Oakland Oakley Rohnert Park San Francisco Santa Rosa United States Vallejo

More information

Parameter	Value	Description
Magnitude	4.2 mb	The magnitude for the event.
Longitude	-122.652° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	38.368° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	13 km	Depth of the event in kilometers.
Place	5 km NE of Rohnert Park, California	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2025-12-14 23:30:44	Time when the event occurred. UTC/GMT
Updated	2025-12-14 23:33:09	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	1	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	271	A number describing how significant the event is. Larger numbers indicate a more significant event.
Network	at	The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources	,at,ew,	A comma-separated list of network contributors.
Number of Stations Used	26	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	0.2856643	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.97 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	111.599991072	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	at00t7a9b8	Id of event.
Event Code	00t7a9b8	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,at00t7a9b8,ew1765755040,	A comma-separated list of event ids that are associated to an event.

Parameter

Value

Description

Magnitude

4.2 mb

The magnitude for the event.

Longitude

-122.652° West

Decimal degrees longitude. Negative values for western longitudes.

Latitude

38.368° North

Decimal degrees latitude. Negative values for southern latitudes.

Depth

13 km

Depth of the event in kilometers.

Place

5 km NE of Rohnert Park, California

Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.

Time

2025-12-14 23:30:44

Time when the event occurred. UTC/GMT

Updated

2025-12-14 23:33:09

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

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

271

A number describing how significant the event is. Larger numbers indicate a more significant event.

Network

The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.

Sources

,at,ew,

A comma-separated list of network contributors.

Number of Stations Used

The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.

Horizontal Distance

0.2856643

Horizontal distance from the epicenter to the nearest station (in degrees).

Root Mean Square

0.97 sec

The root-mean-square (RMS) travel time residual, in sec, using all weights.

Azimuthal Gap

111.599991072

The largest azimuthal gap between azimuthally adjacent stations (in degrees).

Magnitude Type

The method or algorithm used to calculate the preferred magnitude for the event.

Event Type

earthquake

Type of seismic event.

Event ID

at00t7a9b8

Id of event.

Event Code

00t7a9b8

An identifying code assigned by, and unique from, the corresponding source for the event.

Event IDS

,at00t7a9b8,ew1765755040,

A comma-separated list of event ids that are associated to an event.

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Light earthquake, 4.2 mag was detected near Rohnert Park in California

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