Light earthquake 4 mag, 143 km WSW of Ferndale, California

A light earthquake magnitude 4 (ml/mb) strikes 143 km WSW of Ferndale, California (89 miles) on Wednesday. Event id: ew1744815910. Ids that are associated to the earthquake: ew1744815910. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact location, longitude -125.9025° West, latitude 40.2429° North, depth = 8 km. The epicenter was at a depth of 8 km (5 miles). Exact time and date of event in UTC/GMT: 16/04/25 / 2025-04-16 15:04:46 / April 16, 2025 @ 3:04 pm. The temblor was picked up at 15:04:46 / 3:04 pm (local time epicenter).

There are an estimated 13,000 light earthquakes in the world each year. 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 one, in the past 30 days eight and in the last 365 days two hundred and seventeen earthquakes of magnitude 3.0 or greater that have been detected in the same area.

Did you feel it?

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, Distances, Seismometer information, Date-Time, Parameters, Location and details about this quake, that has struck: 143 km WSW of Ferndale, California. This data comes from the USGS Earthquake Notification Service.

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Parameter	Value	Description
Magnitude	4 mb	The magnitude for the event.
Longitude	-125.9025° West	Decimal degrees longitude. Negative values for western longitudes.
Latitude	40.2429° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	8 km	Depth of the event in kilometers.
Place	143 km WSW of Ferndale, California	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2025-04-16 15:04:46	Time when the event occurred. UTC/GMT
Updated	2025-04-16 15:05:15	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	246	A number describing how significant the event is. Larger numbers indicate a more significant event.
Network	ew	The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources	,ew,	A comma-separated list of network contributors.
Number of Stations Used	12	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance		Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap		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	ew1744815910	Id of event.
Event Code	1744815910	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,ew1744815910,	A comma-separated list of event ids that are associated to an event.

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Light earthquake 4 mag, 143 km WSW of Ferndale, California

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