Light earthquake, 4.2 mag strikes near Onagawa Chō in Japan

A light earthquake magnitude 4.2 (ml/mb) has struck on Tuesday, 45 kilometers (28 miles) from Onagawa Chō in Japan. Exact location of event, depth 68.104 km, 141.9194° East, 38.6269° North. The epicenter was at a depth of 68.104 km (42 miles). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Global date and time of event UTC/GMT: 25/11/25 / 2025-11-25 03:17:59 / November 25, 2025 @ 3:17 am. Event id: us6000rufs. Ids that are associated to the earthquake: us6000rufs. The temblor was reported at 03:17:59 / 3:17 am (local time epicenter).

Closest city/cities/towns to epicentrum/hypocenter was Rifu, Mizusawa, Shiogama (min 5000 pop). Event epicenter was 59 km (36 miles) from Ishinomaki (c. 117 200 pop), 84 km (52 miles) from Furukawa (c. 76 300 pop), 75 km (47 miles) from Ichinoseki (c. 63 000 pop), 88 km (55 miles) from Mizusawa (c. 61 300 pop), 84 km (53 miles) from Shiogama (c. 59 500 pop), 72 km (45 miles) from Kamaishi (c. 43 100 pop). Nearby country/countries that might be effected, Japan (c. 127 288 000 pop).

Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. In the past 24 hours, there have been four, in the last 10 days five, in the past 30 days seven and in the last 365 days sixty earthquakes of magnitude 3.0 or greater that has struck near. There are an estimated 13,000 light earthquakes in the world each year.

Did you feel it?

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. This information comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Date-Time, Location, Distances, Parameters and details about this quake, recorded: 45 km ENE of Onagawa Chō, Japan.

More information

Parameter	Value	Description
Magnitude	4.2 mb	The magnitude for the event.
Longitude	141.9194° East	Decimal degrees longitude. Negative values for western longitudes.
Latitude	38.6269° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	68.104 km	Depth of the event in kilometers.
Place	45 km ENE of Onagawa Chō, Japan	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2025-11-25 03:17:59	Time when the event occurred. UTC/GMT
Updated	2025-12-18 05:24:39	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	271	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	30	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	2.258	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.66 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	160	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	us6000rufs	Id of event.
Event Code	6000rufs	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us6000rufs,	A comma-separated list of event ids that are associated to an event.

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Light earthquake, 4.2 mag strikes near Onagawa Chō in Japan

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