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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.1 mag strikes near Saipan in Northern Mariana Islands

Posted by admin on September 17, 2025 0 Comments

Earthquake location 17.534S, 145.3159WA light earthquake with magnitude 4.1 (ml/mb) was detected on Wednesday, 261 km N of Saipan, Northern Mariana Islands (162 miles). Event id: us7000qwca. Ids that are associated to the earthquake: us7000qwca. Exact location of earthquake, longitude 145.3159 East, latitude 17.534 North, depth = 351.737 km. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact time and date of event in UTC/GMT: 20/08/25 / 2025-08-20 23:14:23 / August 20, 2025 @ 11:14 pm. The 4.1-magnitude earthquake was detected at 23:14:23 / 11:14 pm (local time epicenter). The earthquake occurred at a depth of 351.737 km (219 miles) below the earth’s surface.

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 thirty-eight earthquakes of magnitude 3.0 or greater that was reported nearby. 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.

How would you describe the shaking?

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. The information in this article comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, detected near: 261 km N of Saipan, Northern Mariana Islands.

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More information

Parameter Value Description
Magnitude 4.1 mb The magnitude for the event.
Longitude 145.3159° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 17.534° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 351.737 km Depth of the event in kilometers.
Place 261 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 2025-08-20 23:14:23 Time when the event occurred. UTC/GMT
Updated 2025-09-17 03:04:52 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 29 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 2.325 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.47 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 133 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 us7000qwca Id of event.
Event Code 7000qwca An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us7000qwca, A comma-separated list of event ids that are associated to an event.

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