Minor earthquake: M3.98 quake has struck near Olancha in CA

A minor earthquake with magnitude 3.98 (ml/mb) was reported 13 kilometers (8 miles) from Olancha in CA on Sunday. The temblor was detected at 12:27:55 / 12:27 pm (local time epicenter). The earthquake occurred at a depth of 0.43 km (0 miles). Unique identifier: ci41021687. Ids that are associated to the event: ci41021687, ew1752409680. Global date and time of event UTC/GMT: 13/07/25 / 2025-07-13 12:27:55 / July 13, 2025 @ 12:27 pm. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact location of event, longitude -118.0361633 West, latitude 36.1686668 North, depth = 0.43 km.

Closest city/cities or villages, with min 5000 pop, to hypocenter/epicentrum was Porterville, East Porterville, Ridgecrest. Country/countries that might be effected, United States (c. 310 233 000 pop). Epicenter of the earthquake was 89 km (55 miles) from Porterville (c. 54 200 pop), 69 km (43 miles) from Ridgecrest (c. 27 600 pop), 67 km (42 miles) from Alta Sierra (c. 7 000 pop), 85 km (53 miles) from East Porterville (c. 6 800 pop).

Earthquakes 3.0 to 4.0 are often felt, but only causes minor damage. Each year there are an estimated 130,000 minor quakes in the world. In the past 24 hours, there have been one, in the last 10 days one, in the past 30 days one and in the last 365 days twenty-six earthquakes of magnitude 3.0 or greater that has occurred nearby.

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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. The information in this article comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, detected near: 13 km SSW of Olancha, CA.

Alta Sierra CA East Porterville Olancha Porterville Ridgecrest United States

More information

Parameter	Value	Description
Magnitude	3.98 mb	The magnitude for the event.
Longitude	-118.0361633° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	36.1686668° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	0.43 km	Depth of the event in kilometers.
Place	13 km SSW of Olancha, CA	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2025-07-13 12:27:55	Time when the event occurred. UTC/GMT
Updated	2025-07-13 12:32:54	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	4.597	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	244	A number describing how significant the event is. Larger numbers indicate a more significant event.
Network	ci	The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources	,ci,ew,	A comma-separated list of network contributors.
Number of Stations Used	62	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	0.0874	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.26 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	45	The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type	mw	The method or algorithm used to calculate the preferred magnitude for the event.
Event Type	earthquake	Type of seismic event.
Event ID	ci41021687	Id of event.
Event Code	41021687	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,ci41021687,ew1752409680,	A comma-separated list of event ids that are associated to an event.

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Minor earthquake: M3.98 quake has struck near Olancha in CA

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