Light earthquake, 4.5 mag has occurred near Saipan in Northern Mariana Islands

A light earthquake with magnitude 4.5 (ml/mb) was detected on Thursday, 51 kilometers (32 miles) from Saipan in Northern Mariana Islands. Exact time and date of event in UTC/GMT: 21/08/25 / 2025-08-21 05:57:08 / August 21, 2025 @ 5:57 am. The 4.5-magnitude earthquake was detected at 05:57:08 / 5:57 am (local time epicenter). Id of earthquake: us7000qwh2. Event ids that are associated: us7000qwh2. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The earthquake occurred at a depth of 112.693 km (70 miles). Exact location of earthquake, 145.9249° East, 15.6512° North, depth 112.693 km.

Close country/countries that might be effected, Northern Mariana Islands (c. 54 000 pop). Closest city/cities or villages, with min 5000 pop, to hypocenter/epicentrum was San Jose Village, Saipan. The epicenter was 52 km (32 miles) from Saipan (c. 48 200 pop), 83 km (51 miles) from San Jose Village (c. 15 000 pop).

In the past 24 hours, there have been one, in the last 10 days two, in the past 30 days three and in the last 365 days twenty-two 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. Each year there are an estimated 13,000 light earthquakes in the world.

Did you feel it?

How did you respond? Did any furniture slide, topple over, or become displaced? Leave a comment or report about activity, shaking and damage at your home, city and country. This information comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Date-Time, Location, Distances, Parameters and details about this quake, recorded: 51 km NNE of Saipan, Northern Mariana Islands.

More information

Parameter	Value	Description
Magnitude	4.5 mb	The magnitude for the event.
Longitude	145.9249° East	Decimal degrees longitude. Negative values for western longitudes.
Latitude	15.6512° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	112.693 km	Depth of the event in kilometers.
Place	51 km NNE 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	2025-08-21 05:57:08	Time when the event occurred. UTC/GMT
Updated	2025-09-20 05:01:04	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	312	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	28	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	0.429	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.5 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	108	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	us7000qwh2	Id of event.
Event Code	7000qwh2	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us7000qwh2,	A comma-separated list of event ids that are associated to an event.

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Light earthquake, 4.5 mag has occurred near Saipan in Northern Mariana Islands

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