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Light World Earthquakes Magnitude 4-4.9

Light earthquake: M4.5 quake has struck near Onagawa Chō in Japan

Posted by admin on October 25, 2025 0 Comments

Earthquake location 37.6449S, 144.2525WA light earthquake with magnitude 4.5 (ml/mb) was detected on Friday, 261 km ESE of Onagawa Chō, Japan (162 miles). The 4.5-magnitude earthquake was detected at 11:46:58 / 11:46 am (local time epicenter). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Id of earthquake: us6000rhvs. Event ids that are associated: us6000rhvs. Exact time and date of event in UTC/GMT: 26/09/25 / 2025-09-26 11:46:58 / September 26, 2025 @ 11:46 am. Exact location of event, longitude 144.2525 East, latitude 37.6449 North, depth = 10 km. The earthquake occurred at a depth of 10 km (6 miles) below the earth’s surface.

In the past 24 hours, there have been fifteen, in the last 10 days sixteen, in the past 30 days sixteen and in the last 365 days twenty 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.

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: 261 km ESE of Onagawa Chō, Japan.

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More information

Parameter Value Description
Magnitude 4.5 mb The magnitude for the event.
Longitude 144.2525° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 37.6449° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 10 km Depth of the event in kilometers.
Place 261 km ESE of Onagawa Chō, Japan Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2025-09-26 11:46:58 Time when the event occurred. UTC/GMT
Updated 2025-10-25 13:27:06 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 50 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 3.998 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.52 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 136 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 us6000rhvs Id of event.
Event Code 6000rhvs An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us6000rhvs, A comma-separated list of event ids that are associated to an event.

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