Light earthquake 4 mag, Mariana Islands region

A light earthquake with magnitude 4 (ml/mb) was reported Mariana Islands region (0 miles) on Saturday. Exact location of earthquake, longitude 143.4495 East, latitude 21.8376 North, depth = 193.538 km. The epicenter of the earthquake was roughly 193.538 km (120 miles) below the earth’s surface. Global date and time of event UTC/GMT: 23/08/25 / 2025-08-23 12:07:55 / August 23, 2025 @ 12:07 pm. The temblor was reported at 12:07:55 / 12:07 pm (local time epicenter). All ids that are associated to the event: us7000qwxp. Unique identifier: us7000qwxp. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist).

In the past 24 hours, there have been two, in the last 10 days two, in the past 30 days four and in the last 365 days fourty earthquakes of magnitude 3.0 or greater that has struck near. Each 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.

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Were you asleep? Was it difficult to stand and/or walk? Leave a comment or report about shaking, activity and damage at your city, home and country. 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 mb	The magnitude for the event.
Longitude	143.4495° East	Decimal degrees longitude. Negative values for western longitudes.
Latitude	21.8376° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	193.538 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	2025-08-23 12:07:55	Time when the event occurred. UTC/GMT
Updated	2025-09-19 12:54:37	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	42	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	5.36	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.78 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	139	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	us7000qwxp	Id of event.
Event Code	7000qwxp	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us7000qwxp,	A comma-separated list of event ids that are associated to an event.

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Light earthquake 4 mag, Mariana Islands region

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