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Light earthquake 4.5 mag, 12 km W of Ichihara, Japan

Posted by admin on October 3, 2025 0 Comments

Earthquake location 35.5187S, 139.9476WA light earthquake magnitude 4.5 (ml/mb) has struck on Friday, 12 kilometers (7 miles) from Ichihara in Japan. Event id: us6000reeg. Ids that are associated to the earthquake: us6000reeg. The temblor was reported at 03:48:03 / 3:48 am (local time epicenter). Exact location of event, depth 103.237 km, 139.9476° East, 35.5187° North. 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 103.237 km (64 miles) below the earth’s surface. Exact time and date of earthquake 03/10/25 / 2025-10-03 03:48:03 / October 3, 2025 @ 3:48 am UTC/GMT.

Epicenter of the earthquake was 30 km (19 miles) from Tokyo (c. 8 336 600 pop), 29 km (18 miles) from Yokohama (c. 3 574 400 pop), 21 km (13 miles) from Kawasaki (c. 1 306 800 pop), 51 km (31 miles) from Saitama (c. 1 193 400 pop), 49 km (31 miles) from Yono (c. 1 077 700 pop), 19 km (12 miles) from Chiba (c. 919 700 pop), 58 km (36 miles) from Hachiōji (c. 579 400 pop). Closest city/cities/towns to epicentrum/hypocenter was Fukayachō, Gotemba, Okunoya (min 5000 pop). Nearby country/countries, Japan (c. 127 288 000 pop) (That might be effected).

In the past 24 hours, there have been one, in the last 10 days one, in the past 30 days five and in the last 365 days fifty-eight earthquakes of magnitude 3.0 or greater that have been detected nearby. 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.

Did you feel anything?

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. The information in this article comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, detected near: 12 km W of Ichihara, Japan.

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More information

Parameter Value Description
Magnitude 4.5 mb The magnitude for the event.
Longitude 139.9476° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 35.5187° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 103.237 km Depth of the event in kilometers.
Place 12 km W of Ichihara, 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 03:48:03 Time when the event occurred. UTC/GMT
Updated 2025-10-03 04:04:40 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 37 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 1.74 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.33 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 131 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 us6000reeg Id of event.
Event Code 6000reeg An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us6000reeg, A comma-separated list of event ids that are associated to an event.

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