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Light earthquake, 4.5 mag was detected near Kisarazu in Japan

Posted by admin on April 20, 2025 0 Comments

A light earthquake with magnitude 4.5 (ml/mb) was detected on Sunday, 8 kilometers (5 miles) from Kisarazu in Japan. Unique identifier: us6000q7ck. Ids that are associated to the event: us6000q7ck. Exact time and date of event in UTC/GMT: 20/04/25 / 2025-04-20 06:11:07 / April 20, 2025 @ 6:11 am. The temblor was picked up at 06:11:07 / 6:11 am (local time epicenter). Exact location of event, longitude 139.9978 East, latitude 35.437 North, depth = 87.785 km. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The epicenter was at a depth of 87.785 km (55 miles).

Country/countries that might be effected, Japan (c. 127 288 000 pop). Nearest cities/city/villages to epicentrum/hypocenter was Yūki, Shimodate, Fujioka (min 5000 pop). Event epicenter was 39 km (25 miles) from Tokyo (c. 8 336 600 pop), 32 km (20 miles) from Yokohama (c. 3 574 400 pop), 27 km (17 miles) from Kawasaki (c. 1 306 800 pop), 61 km (38 miles) from Saitama (c. 1 193 400 pop), 60 km (37 miles) from Yono (c. 1 077 700 pop), 22 km (14 miles) from Chiba (c. 919 700 pop), 66 km (41 miles) from Hachiōji (c. 579 400 pop).

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 sixty-four earthquakes of magnitude 3.0 or greater that has occurred nearby. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. Each year there are an estimated 13,000 light quakes in the world.

Did you feel the quake?

Did objects rattle, topple over, or fall off shelves? Leave a comment or report about activity, shaking and damage at your home, country and city. 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: 8 km NE of Kisarazu, Japan.

More information

Parameter	Value	Description
Magnitude	4.5 mb	The magnitude for the event.
Longitude	139.9978° East	Decimal degrees longitude. Negative values for western longitudes.
Latitude	35.437° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	87.785 km	Depth of the event in kilometers.
Place	8 km NE of Kisarazu, Japan	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2025-04-20 06:11:07	Time when the event occurred. UTC/GMT
Updated	2025-04-20 06:34:04	Time when the event was most recently updated. UTC/GMT
Timezone offset		Timezone offset from UTC in minutes at the event epicenter.
Felt	1	The total number of felt reports
CDI	2.2	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	40	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	1.822	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.87 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	144	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	us6000q7ck	Id of event.
Event Code	6000q7ck	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us6000q7ck,	A comma-separated list of event ids that are associated to an event.

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Light earthquake, 4.5 mag was detected near Kisarazu in Japan

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