Minor earthquake 3.8 mag, 256 km N of Saipan, Northern Mariana Islands

A minor earthquake with magnitude 3.8 (ml/mb) was reported 256 km N of Saipan, Northern Mariana Islands (159 miles) on Sunday. Exact location of event, depth 519.858 km, 145.7199° East, 17.5334° North. The temblor was detected at 16:04:44 / 4:04 pm (local time epicenter). Unique identifier: us7000qx0y. Ids that are associated to the event: us7000qx0y. The earthquake occurred at a depth of 519.858 km (323 miles). Date and time of earthquake in UTC/GMT: 24/08/25 / 2025-08-24 16:04:44 / August 24, 2025 @ 4:04 pm.

In the past 24 hours, there have been two, in the last 10 days three, in the past 30 days four and in the last 365 days fourty-five earthquakes of magnitude 3.0 or greater that was reported nearby. Earthquakes 3.0 to 4.0 are often felt, but only causes minor damage. Each year there are an estimated 130,000 minor quakes in the world.

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What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity 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: 256 km N of Saipan, Northern Mariana Islands. This data comes from the USGS Earthquake Notification Service.

Northern Mariana Islands Saipan

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Parameter	Value	Description
Magnitude	3.8 mb	The magnitude for the event.
Longitude	145.7199° East	Decimal degrees longitude. Negative values for western longitudes.
Latitude	17.5334° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	519.858 km	Depth of the event in kilometers.
Place	256 km N of Saipan, Northern Mariana Islands	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2025-08-24 16:04:44	Time when the event occurred. UTC/GMT
Updated	2025-09-21 19:19:22	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	222	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	22	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	2.281	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.57 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	125	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	us7000qx0y	Id of event.
Event Code	7000qx0y	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us7000qx0y,	A comma-separated list of event ids that are associated to an event.

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Minor earthquake 3.8 mag, 256 km N of Saipan, Northern Mariana Islands

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