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Light earthquake, 4.3 mag strikes near Suzaka in Japan

Posted by admin on September 9, 2025 0 Comments

A light earthquake magnitude 4.3 (ml/mb) has occurred on Sunday, 9 kilometers (6 miles) from Suzaka in Japan. Event ids that are associated to the earthquake: us7000qump. Id of event: us7000qump. The 4.3-magnitude earthquake was detected at 23:24:28 / 11:24 pm (local time epicenter). The earthquake occurred at a depth of 137.476 km (85 miles). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Global date and time of event UTC/GMT: 07/09/25 / 2025-09-07 23:24:28 / September 7, 2025 @ 11:24 pm. Exact location of earthquake, longitude 138.2515 East, latitude 36.5816 North, depth = 137.476 km.

Country/countries that might be effected, Japan (c. 127 288 000 pop). Nearest cities/city/villages to epicentrum/hypocenter was Ōmamachō-ōmama, Honjō, Kashiwazaki (min 5000 pop). Event epicenter was 10 km (6 miles) from Nagano-shi (c. 360 200 pop), 75 km (47 miles) from Maebashi-shi (c. 282 700 pop), 74 km (46 miles) from Takasaki (c. 240 900 pop), 46 km (29 miles) from Matsumoto (c. 210 700 pop), 63 km (39 miles) from Jōetsu (c. 204 100 pop), 90 km (56 miles) from Isesaki (c. 130 700 pop).

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. In the past 24 hours, there have been one, in the last 10 days one, in the past 30 days one and in the last 365 days nine earthquakes of magnitude 3.0 or greater that has struck near.

How would you describe the shaking?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity at your home, city and country. This information comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Date-Time, Location, Distances, Parameters and details about this quake, recorded: 9 km SW of Suzaka, Japan.

More information

Parameter	Value	Description
Magnitude	4.3 mb	The magnitude for the event.
Longitude	138.2515° East	Decimal degrees longitude. Negative values for western longitudes.
Latitude	36.5816° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	137.476 km	Depth of the event in kilometers.
Place	9 km SW of Suzaka, Japan	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2025-09-07 23:24:28	Time when the event occurred. UTC/GMT
Updated	2025-09-09 04:55:32	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	284	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	14	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	0.052	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.64 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	135	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	us7000qump	Id of event.
Event Code	7000qump	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us7000qump,	A comma-separated list of event ids that are associated to an event.

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Light earthquake, 4.3 mag strikes near Suzaka in Japan

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