Light earthquake: M4.3 quake has struck near Mutsu in Japan

A light earthquake with magnitude 4.3 (ml/mb) was reported 23 kilometers (14 miles) from Mutsu in Japan on Friday. Exact location of earthquake, 141.2169° East, 41.5019° North, depth 121.35 km. The temblor was reported at 01:18:49 / 1:18 am (local time epicenter). The epicenter was at a depth of 121.35 km (75 miles). Event ids that are associated to the earthquake: us7000pn8n. Id of event: us7000pn8n. Exact time and date of event in UTC/GMT: 28/03/25 / 2025-03-28 01:18:49 / March 28, 2025 @ 1:18 am. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist).

Nearby country/countries that might be effected, Japan (c. 127 288 000 pop). Nearest cities/city/towns to hypocenter/epicentrum was Muroran, Misawa, Aomori Shi (min 5000 pop). The epicenter was 85 km (53 miles) from Aomori Shi (c. 298 400 pop), 50 km (31 miles) from Hakodate (c. 275 700 pop), 93 km (58 miles) from Muroran (c. 96 200 pop), 24 km (15 miles) from Mutsu (c. 49 200 pop), 92 km (57 miles) from Misawa (c. 42 800 pop), 59 km (37 miles) from Kamiiso (c. 38 100 pop).

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 twenty-three earthquakes of magnitude 3.0 or greater that has struck near. 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.

How would you describe the shaking?

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 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: 23 km N of Mutsu, Japan.

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Parameter	Value	Description
Magnitude	4.3 mb	The magnitude for the event.
Longitude	141.2169° East	Decimal degrees longitude. Negative values for western longitudes.
Latitude	41.5019° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	121.35 km	Depth of the event in kilometers.
Place	23 km N of Mutsu, Japan	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2025-03-28 01:18:49	Time when the event occurred. UTC/GMT
Updated	2025-03-28 21:44:16	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	284	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	43	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	0.721	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.71 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	119	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	us7000pn8n	Id of event.
Event Code	7000pn8n	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us7000pn8n,	A comma-separated list of event ids that are associated to an event.

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Light earthquake: M4.3 quake has struck near Mutsu in Japan

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