Light earthquake, 4 mag was detected near Ama in Japan

A light earthquake magnitude 4 (ml/mb) strikes 252 km NNE of Ama, Japan (157 miles) on Friday. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The temblor was reported at 18:44:09 / 6:44 pm (local time epicenter). Exact location of earthquake, longitude 134.1876 East, latitude 38.1939 North, depth = 420.278 km. Exact time and date of event in UTC/GMT: 24/10/25 / 2025-10-24 18:44:09 / October 24, 2025 @ 6:44 pm. Unique identifier: us6000rj9v. Ids that are associated to the event: us6000rj9v. The earthquake was roughly at a depth of 420.278 km (261 miles).

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 four earthquakes of magnitude 3.0 or greater that has occurred nearby. Every year there are an estimated 13,000 light earthquakes in the world. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage.

Did you feel the quake?

How did you react? Was there any damage to buildings? Leave a comment or report about shaking, activity 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: 252 km NNE of Ama, Japan. This data comes from the USGS Earthquake Notification Service.

Ama Japan

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Parameter	Value	Description
Magnitude	4 mb	The magnitude for the event.
Longitude	134.1876° East	Decimal degrees longitude. Negative values for western longitudes.
Latitude	38.1939° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	420.278 km	Depth of the event in kilometers.
Place	252 km NNE of Ama, Japan	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2025-10-24 18:44:09	Time when the event occurred. UTC/GMT
Updated	2025-10-24 21:48:15	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	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	246	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	94	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	3.597	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.62 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	36	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	us6000rj9v	Id of event.
Event Code	6000rj9v	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us6000rj9v,	A comma-separated list of event ids that are associated to an event.

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Light earthquake, 4 mag was detected near Ama in Japan

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