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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.5 mag strikes near Onagawa Chō in Japan

Posted by admin on October 23, 2025 0 Comments

Earthquake location 37.7406S, 144.1271WA light earthquake with magnitude 4.5 (ml/mb) was reported 247 km ESE of Onagawa Chō, Japan (153 miles) on Saturday. The epicenter of the earthquake was roughly 10 km (6 miles) below the earth’s surface. Unique identifier: us6000rhx5. Ids that are associated to the event: us6000rhx5. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The temblor was detected at 23:29:02 / 11:29 pm (local time epicenter). Global date and time of event UTC/GMT: 27/09/25 / 2025-09-27 23:29:02 / September 27, 2025 @ 11:29 pm. Exact location of event, longitude 144.1271 East, latitude 37.7406 North, depth = 10 km.

Every 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. In the past 24 hours, there have been ten, in the last 10 days twelve, in the past 30 days twelve and in the last 365 days fifteen earthquakes of magnitude 3.0 or greater that was reported nearby.

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. Read more about the earthquake, Distances, Seismometer information, Date-Time, Parameters, Location and details about this quake, that has struck: 247 km ESE of Onagawa Chō, Japan. 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 144.1271° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 37.7406° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 10 km Depth of the event in kilometers.
Place 247 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 2025-09-27 23:29:02 Time when the event occurred. UTC/GMT
Updated 2025-10-23 02:29:19 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 34 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 3.862 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.62 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 141 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 us6000rhx5 Id of event.
Event Code 6000rhx5 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us6000rhx5, A comma-separated list of event ids that are associated to an event.

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