Light earthquake, 4.1 mag was detected near Katsuura in Japan

A light earthquake magnitude 4.1 (ml/mb) strikes 62 kilometers (39 miles) from Katsuura in Japan on Friday. The temblor was picked up at 03:17:41 / 3:17 am (local time epicenter). The earthquake occurred at a depth of 96.05 km (60 miles) below the earth’s surface. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Event id: us7000q13q. Ids that are associated to the earthquake: us7000q13q. Global date and time of event UTC/GMT: 09/05/25 / 2025-05-09 03:17:41 / May 9, 2025 @ 3:17 am. Exact location, longitude 140.4511° East, latitude 34.5946° North, depth = 96.05 km.

Close country/countries, Japan (c. 127 288 000 pop) (That might be effected). Nearest cities/city/towns to hypocenter/epicentrum was Ōhara, Tateyama, Kawaguchi (min 5000 pop). Event epicenter was 69 km (43 miles) from Tateyama (c. 50 100 pop), 64 km (40 miles) from Kawaguchi (c. 29 100 pop), 62 km (39 miles) from Katsuura (c. 22 300 pop), 73 km (45 miles) from Ōhara (c. 20 200 pop).

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

Questions or comments?

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, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 62 km SSE of Katsuura, Japan. This information comes from the USGS Earthquake Notification Service.

More information

Parameter	Value	Description
Magnitude	4.1 mb	The magnitude for the event.
Longitude	140.4511° East	Decimal degrees longitude. Negative values for western longitudes.
Latitude	34.5946° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	96.05 km	Depth of the event in kilometers.
Place	62 km SSE of Katsuura, Japan	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2025-05-09 03:17:41	Time when the event occurred. UTC/GMT
Updated	2025-05-23 22:26:53	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	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	259	A number describing how significant the event is. Larger numbers indicate a more significant event.
Network	us	The ID of a data contributor. Identifies the network considered to be the preferred source of information for this event.
Sources	,us,	A comma-separated list of network contributors.
Number of Stations Used	23	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	1.568	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.73 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	137	The largest azimuthal gap between azimuthally adjacent stations (in degrees).
Magnitude Type	mb	The method or algorithm used to calculate the preferred magnitude for the event.
Event Type	earthquake	Type of seismic event.
Event ID	us7000q13q	Id of event.
Event Code	7000q13q	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us7000q13q,	A comma-separated list of event ids that are associated to an event.

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Light earthquake, 4.1 mag was detected near Katsuura in Japan

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