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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.5 mag has occurred near Colonia in Micronesia

Posted by admin on September 30, 2025 0 Comments

Earthquake location 10.9916S, 138.592WA light earthquake with magnitude 4.5 (ml/mb) was detected on Thursday, 171 km NNE of Colonia, Micronesia (106 miles). Exact location of event, depth 10 km, 138.592° East, 10.9916° North. Global date and time of event UTC/GMT: 04/09/25 / 2025-09-04 23:21:11 / September 4, 2025 @ 11:21 pm. The 4.5-magnitude earthquake has occurred at 23:21:11 / 11:21 pm (local time epicenter). The epicenter of the earthquake was roughly 10 km (6 miles) below the earth’s surface. Unique identifier: us6000rd81. Ids that are associated to the event: us6000rd81. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist).

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. In the past 24 hours, there have been one, in the last 10 days one, in the past 30 days one and in the last 365 days four earthquakes of magnitude 3.0 or greater that has occurred nearby.

Did you feel it?

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: 171 km NNE of Colonia, Micronesia. This data comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4.5 mb The magnitude for the event.
Longitude 138.592° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 10.9916° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 10 km Depth of the event in kilometers.
Place 171 km NNE of Colonia, Micronesia Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2025-09-04 23:21:11 Time when the event occurred. UTC/GMT
Updated 2025-09-30 04:10:04 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 17 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 5.446 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.46 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 146 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 us6000rd81 Id of event.
Event Code 6000rd81 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us6000rd81, A comma-separated list of event ids that are associated to an event.

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