Light earthquake, 4 mag strikes near Tomakomai in Japan

Posted by admin on February 17, 2025 0 Comments

A light earthquake with magnitude 4 (ml/mb) was detected on Thursday, 20 kilometers (12 miles) from Tomakomai in Japan. Date and time of earthquake in UTC/GMT: 30/01/25 / 2025-01-30 09:20:41 / January 30, 2025 @ 9:20 am. Exact location of earthquake, 141.6546° East, 42.4546° North, depth 129.275 km. Event id: us7000pbvj. Ids that are associated to the earthquake: us7000pbvj. The epicenter of the earthquake was roughly 129.275 km (80 miles) below the earth’s surface. The temblor was detected at 09:20:41 / 9:20 am (local time epicenter). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist).

Nearest cities/city/towns to hypocenter/epicentrum was Tōbetsu, Iwamizawa, Ebetsu (min 5000 pop). Close country/countries that might be effected, Japan (c. 127 288 000 pop). Epicenter of the event was 72 km (45 miles) from Sapporo (c. 1 883 000 pop), 21 km (13 miles) from Tomakomai (c. 174 800 pop), 73 km (45 miles) from Ebetsu (c. 134 000 pop), 57 km (35 miles) from Muroran (c. 96 200 pop), 41 km (25 miles) from Chitose (c. 92 900 pop), 83 km (52 miles) from Iwamizawa (c. 85 100 pop).

In the past 24 hours, there have been two, in the last 10 days two, in the past 30 days three and in the last 365 days nineteen earthquakes of magnitude 3.0 or greater that have been detected in the same area. 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.

How would you describe the shaking?

How did you react? Was there any damage to buildings? Leave a comment or report about shaking, activity and damage at your home, city and country. This data comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, that has occurred near: 20 km SSE of Tomakomai, Japan.

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Parameter	Value	Description
Magnitude	4 mb	The magnitude for the event.
Longitude	141.6546° East	Decimal degrees longitude. Negative values for western longitudes.
Latitude	42.4546° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	129.275 km	Depth of the event in kilometers.
Place	20 km SSE of Tomakomai, Japan	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2025-01-30 09:20:41	Time when the event occurred. UTC/GMT
Updated	2025-02-17 09:24:50	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	246	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	27	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	1.199	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.57 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	76	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	us7000pbvj	Id of event.
Event Code	7000pbvj	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us7000pbvj,	A comma-separated list of event ids that are associated to an event.

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Light earthquake, 4 mag strikes near Tomakomai in Japan

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