Light earthquake, 4.1 mag strikes near Mariana Islands region

A light earthquake with magnitude 4.1 (ml/mb) was detected on Tuesday, Mariana Islands region (0 miles). The epicenter was at a depth of 127.692 km (79 miles). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The temblor was picked up at 13:17:11 / 1:17 pm (local time epicenter). Event id: us7000qu64. Ids that are associated to the earthquake: us7000qu64. Global date and time of event UTC/GMT: 12/08/25 / 2025-08-12 13:17:11 / August 12, 2025 @ 1:17 pm. Exact location of event, longitude 144.4126 East, latitude 21.285 North, depth = 127.692 km.

Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. In the past 24 hours, there have been one, in the last 10 days one, in the past 30 days two and in the last 365 days twenty-four earthquakes of magnitude 3.0 or greater that have been detected in the same area. There are an estimated 13,000 light quakes in the world each year.

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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. Read more about the earthquake, Distances, Seismometer information, Date-Time, Parameters, Location and details about this quake, that has struck: Mariana Islands region. This data comes from the USGS Earthquake Notification Service.

Mariana Islands region

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Parameter	Value	Description
Magnitude	4.1 mb	The magnitude for the event.
Longitude	144.4126° East	Decimal degrees longitude. Negative values for western longitudes.
Latitude	21.285° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	127.692 km	Depth of the event in kilometers.
Place	Mariana Islands region	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2025-08-12 13:17:11	Time when the event occurred. UTC/GMT
Updated	2025-09-05 21:19:30	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	36	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	6.131	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.58 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	114	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	us7000qu64	Id of event.
Event Code	7000qu64	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us7000qu64,	A comma-separated list of event ids that are associated to an event.

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Light earthquake, 4.1 mag strikes near Mariana Islands region

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