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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4 mag has occurred near Mariana Islands region

Posted by admin on July 25, 2025 0 Comments

Earthquake location 21.4905S, 143.6307WA light earthquake magnitude 4 (ml/mb) has occurred on Friday, Mariana Islands region (0 miles). The 4-magnitude earthquake was detected at 17:01:16 / 5:01 pm (local time epicenter). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The epicenter of the earthquake was roughly 177.205 km (110 miles) below the earth’s surface. Exact location of earthquake, longitude 143.6307 East, latitude 21.4905 North, depth = 177.205 km. Exact time and date of event in UTC/GMT: 04/07/25 / 2025-07-04 17:01:16 / July 4, 2025 @ 5:01 pm. Unique identifier: us7000qcub. Ids that are associated to the event: us7000qcub.

In the past 24 hours, there have been two, in the last 10 days two, in the past 30 days eight and in the last 365 days thirty-nine earthquakes of magnitude 3.0 or greater that have been detected in the same area. Each year there are an estimated 13,000 light quakes in the world. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage.

Did you feel anything?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity at your home, city and country. This data comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, that has occurred near: Mariana Islands region.

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More information

Parameter Value Description
Magnitude 4 mb The magnitude for the event.
Longitude 143.6307° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 21.4905° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 177.205 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 2025-07-04 17:01:16 Time when the event occurred. UTC/GMT
Updated 2025-07-25 16:47:12 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 31 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 5.734 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.02 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 124 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 us7000qcub Id of event.
Event Code 7000qcub An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us7000qcub, A comma-separated list of event ids that are associated to an event.

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