Light earthquake, 4.1 mag has occurred near Izu Islands, Japan region

A light earthquake magnitude 4.1 (ml/mb) strikes Izu Islands, Japan region (0 miles) on Sunday. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact location of earthquake, longitude 138.8458 East, latitude 30.0213 North, depth = 409.473 km. The earthquake was roughly at a depth of 409.473 km (254 miles). The 4.1-magnitude earthquake has occurred at 15:50:42 / 3:50 pm (local time epicenter). Event id: us6000rwce. Ids that are associated to the earthquake: us6000rwce. Exact time and date of event in UTC/GMT: 21/12/25 / 2025-12-21 15:50:42 / December 21, 2025 @ 3:50 pm.

Each year there are an estimated 13,000 light quakes in the world. 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 seventeen earthquakes of magnitude 3.0 or greater that have been detected nearby. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage.

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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: Izu Islands, Japan region. This data comes from the USGS Earthquake Notification Service.

Izu Islands Japan region

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Parameter	Value	Description
Magnitude	4.1 mb	The magnitude for the event.
Longitude	138.8458° East	Decimal degrees longitude. Negative values for western longitudes.
Latitude	30.0213° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	409.473 km	Depth of the event in kilometers.
Place	Izu Islands, Japan region	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2025-12-21 15:50:42	Time when the event occurred. UTC/GMT
Updated	2025-12-21 17:31:06	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	5.53	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.54 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	131	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	us6000rwce	Id of event.
Event Code	6000rwce	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us6000rwce,	A comma-separated list of event ids that are associated to an event.

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Light earthquake, 4.1 mag has occurred near Izu Islands, Japan region

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