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Light World Earthquakes Magnitude 4-4.9

Light earthquake: M4.6 quake has struck near Tomioka in Japan

Posted by admin on October 25, 2025 0 Comments

Earthquake location 37.3914S, 141.0693WA light earthquake magnitude 4.6 (ml/mb) has occurred on Friday, 7 kilometers (4 miles) from Tomioka in Japan. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The temblor was reported at 06:20:20 / 6:20 am (local time epicenter). The epicenter of the earthquake was roughly 73.977 km (46 miles) below the earth’s surface. Exact time and date of earthquake 03/10/25 / 2025-10-03 06:20:20 / October 3, 2025 @ 6:20 am UTC/GMT. Unique identifier: us6000rj3l. Ids that are associated to the event: us6000rj3l. Exact location, longitude 141.0693° East, latitude 37.3914° North, depth = 73.977 km.

Event epicenter was 98 km (61 miles) from Sendai (c. 1 063 100 pop), 41 km (26 miles) from Iwaki (c. 357 300 pop), 61 km (38 miles) from Kōriyama (c. 340 600 pop), 66 km (41 miles) from Fukushima-shi (c. 294 200 pop), 96 km (59 miles) from Hitachi (c. 186 300 pop), 62 km (38 miles) from Sukagawa (c. 68 800 pop), 73 km (45 miles) from Kitaibaraki (c. 50 800 pop). Nearest city/cities or towns, with min 5000 pop, to epicentrum/hypocenter was Sendai, Hitachi, Daigo. Close country/countries that might be effected, Japan (c. 127 288 000 pop).

Each year there are an estimated 13,000 light earthquakes in the world. In the past 24 hours, there have been five, in the last 10 days five, in the past 30 days eight and in the last 365 days sixty earthquakes of magnitude 3.0 or greater that has struck near. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage.

Questions or comments?

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. 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: 7 km NE of Tomioka, Japan.

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More information

Parameter Value Description
Magnitude 4.6 mb The magnitude for the event.
Longitude 141.0693° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 37.3914° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 73.977 km Depth of the event in kilometers.
Place 7 km NE of Tomioka, Japan Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2025-10-03 06:20:20 Time when the event occurred. UTC/GMT
Updated 2025-10-25 05:53:02 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 326 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 30 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 2.443 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.56 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 109 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 us6000rj3l Id of event.
Event Code 6000rj3l An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us6000rj3l, A comma-separated list of event ids that are associated to an event.

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