Light earthquake, 4.4 mag was detected near Yotsukaidō in Japan

Posted by admin on July 17, 2025 0 Comments

A light earthquake with magnitude 4.4 (ml/mb) was detected on Friday, 2 kilometers (1 miles) from Yotsukaidō in Japan. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact location of earthquake, longitude 140.1503 East, latitude 35.6682 North, depth = 73.845 km. The 4.4-magnitude earthquake was detected at 10:54:58 / 10:54 am (local time epicenter). Exact time and date of earthquake 20/06/25 / 2025-06-20 10:54:58 / June 20, 2025 @ 10:54 am UTC/GMT. The epicenter was at a depth of 73.845 km (46 miles). Event ids that are associated to the earthquake: us7000qagh. Id of event: us7000qagh.

Nearby country/countries, Japan (c. 127 288 000 pop) (That might be effected). Epicenter of the event was 41 km (26 miles) from Tokyo (c. 8 336 600 pop), 52 km (32 miles) from Yokohama (c. 3 574 400 pop), 42 km (26 miles) from Kawasaki (c. 1 306 800 pop), 52 km (32 miles) from Saitama (c. 1 193 400 pop), 52 km (33 miles) from Yono (c. 1 077 700 pop), 7 km (5 miles) from Chiba (c. 919 700 pop). Closest city/cities/towns to epicentrum/hypocenter was Motegi, Uenohara, Tanuma (min 5000 pop).

There are an estimated 13,000 light quakes in the world each year. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. In the past 24 hours, there have been five, in the last 10 days six, in the past 30 days ten and in the last 365 days seventy-one earthquakes of magnitude 3.0 or greater that was reported nearby.

How would you describe the shaking?

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. Read more about the earthquake, Distances, Seismometer information, Date-Time, Parameters, Location and details about this quake, that has struck: 2 km NW of Yotsukaidō, Japan. This data comes from the USGS Earthquake Notification Service.

More information

Parameter	Value	Description
Magnitude	4.4 mb	The magnitude for the event.
Longitude	140.1503° East	Decimal degrees longitude. Negative values for western longitudes.
Latitude	35.6682° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	73.845 km	Depth of the event in kilometers.
Place	2 km NW of Yotsukaidō, Japan	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2025-06-20 10:54:58	Time when the event occurred. UTC/GMT
Updated	2025-07-17 17:31:10	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	298	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	28	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	1.798	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	126	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	us7000qagh	Id of event.
Event Code	7000qagh	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us7000qagh,	A comma-separated list of event ids that are associated to an event.

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Light earthquake, 4.4 mag was detected near Yotsukaidō in Japan

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