Light earthquake, 4.13 mag strikes near Petrolia in CA

A light earthquake with magnitude 4.13 (ml/mb) was reported 22 kilometers (14 miles) from Petrolia in CA on Monday. The temblor was reported at 08:17:23 / 8:17 am (local time epicenter). The epicenter was at a depth of 10.109999656677 km (6 miles). Exact time and date of event in UTC/GMT: 26/05/25 / 2025-05-26 08:17:23 / May 26, 2025 @ 8:17 am. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Event ids that are associated to the earthquake: nc75186616. Id of event: nc75186616. Exact location of earthquake, -124.53450012207° West, 40.289333343506° North, depth 10.109999656677 km.

Closest city/cities or villages, with min 5000 pop, to hypocenter/epicentrum was McKinleyville, Arcata, Bayside. Earthquake epicenter was 65 km (40 miles) from Eureka (c. 27 200 pop), 75 km (46 miles) from Arcata (c. 17 200 pop), 73 km (46 miles) from Bayside (c. 17 100 pop), 82 km (51 miles) from McKinleyville (c. 15 200 pop), 47 km (29 miles) from Fortuna (c. 11 900 pop). Close country/countries, United States (c. 310 233 000 pop) (That might be effected).

There are an estimated 13,000 light quakes in the world each year. In the past 24 hours, there have been two, in the last 10 days six, in the past 30 days nine and in the last 365 days two hundred and sixty-three earthquakes of magnitude 3.0 or greater that has struck near. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage.

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What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity at your home, city and country. Read more about the earthquake, Distances, Seismometer information, Date-Time, Parameters, Location and details about this quake, that has struck: 22 km W of Petrolia, CA. This data comes from the USGS Earthquake Notification Service.

More information

Parameter	Value	Description
Magnitude	4.13 mb	The magnitude for the event.
Longitude	-124.53450012207° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	40.289333343506° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	10.109999656677 km	Depth of the event in kilometers.
Place	22 km W of Petrolia, CA	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2025-05-26 08:17:23	Time when the event occurred. UTC/GMT
Updated	2025-05-26 08:21:59	Time when the event was most recently updated. UTC/GMT
Timezone offset		Timezone offset from UTC in minutes at the event epicenter.
Felt	1	The total number of felt reports
CDI	3.4	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	263	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	34	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	0.1781	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.07 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	271	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	nc75186616	Id of event.
Event Code	75186616	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,nc75186616,	A comma-separated list of event ids that are associated to an event.

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Light earthquake, 4.13 mag strikes near Petrolia in CA

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