Light earthquake: M4.1 quake has struck near Asahi in Japan

A light earthquake magnitude 4.1 (ml/mb) strikes 16 kilometers (10 miles) from Asahi in Japan on Friday. Exact location of event, longitude 140.6853 East, latitude 35.5735 North, depth = 56.131 km. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The epicenter of the earthquake was roughly 56.131 km (35 miles) below the earth’s surface. The temblor was reported at 05:31:50 / 5:31 am (local time epicenter). Global date and time of event UTC/GMT: 24/01/25 / 2025-01-24 05:31:50 / January 24, 2025 @ 5:31 am. Id of earthquake: us7000paeh. Event ids that are associated: us7000paeh.

Nearby country/countries that might be effected, Japan (c. 127 288 000 pop). Nearest city/cities or towns, with min 5000 pop, to epicentrum/hypocenter was Kawaguchi, Katsuta, Tokyo. Event epicenter was 91 km (56 miles) from Tokyo (c. 8 336 600 pop), 88 km (55 miles) from Kawasaki (c. 1 306 800 pop), 51 km (32 miles) from Chiba (c. 919 700 pop), 65 km (40 miles) from Funabashi (c. 560 700 pop), 75 km (46 miles) from Matsudo (c. 470 300 pop), 92 km (57 miles) from Kawaguchi (c. 468 600 pop).

In the past 24 hours, there have been one, in the last 10 days one, in the past 30 days four and in the last 365 days fifty-five 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. There are an estimated 13,000 light quakes in the world each year.

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. This data comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, that has occurred near: 16 km SSE of Asahi, Japan.

More information

Parameter	Value	Description
Magnitude	4.1 mb	The magnitude for the event.
Longitude	140.6853° East	Decimal degrees longitude. Negative values for western longitudes.
Latitude	35.5735° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	56.131 km	Depth of the event in kilometers.
Place	16 km SSE of Asahi, Japan	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2025-01-24 05:31:50	Time when the event occurred. UTC/GMT
Updated	2025-02-01 07:19:26	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	25	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	2.227	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.49 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	161	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	us7000paeh	Id of event.
Event Code	7000paeh	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us7000paeh,	A comma-separated list of event ids that are associated to an event.

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Light earthquake: M4.1 quake has struck near Asahi in Japan

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