Light earthquake, 4.4 mag strikes near Koshima in Japan

A light earthquake with magnitude 4.4 (ml/mb) was reported 103 km S of Koshima, Japan (64 miles) on Sunday. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Unique identifier: us7000mdk5. Ids that are associated to the event: us7000mdk5. The temblor was detected at 00:27:28 / 12:27 am (local time epicenter). Exact time and date of earthquake 21/04/24 / 2024-04-21 00:27:28 / April 21, 2024 @ 12:27 am UTC/GMT. The epicenter of the earthquake was roughly 37.717 km (23 miles) below the earth’s surface. Exact location, longitude 130.5397° East, latitude 29.3004° North, depth = 37.717 km.

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

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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. Read more about the earthquake, Distances, Seismometer information, Date-Time, Parameters, Location and details about this quake, that has struck: 103 km S of Koshima, Japan. This data comes from the USGS Earthquake Notification Service.

Japan Koshima

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Parameter	Value	Description
Magnitude	4.4 mb	The magnitude for the event.
Longitude	130.5397° East	Decimal degrees longitude. Negative values for western longitudes.
Latitude	29.3004° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	37.717 km	Depth of the event in kilometers.
Place	103 km S of Koshima, Japan	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2024-04-21 00:27:28	Time when the event occurred. UTC/GMT
Updated	2024-05-15 05:08:57	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	50	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	2.203	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.71 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	129	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	us7000mdk5	Id of event.
Event Code	7000mdk5	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us7000mdk5,	A comma-separated list of event ids that are associated to an event.

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Light earthquake, 4.4 mag strikes near Koshima in Japan

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