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Light earthquake 4.5 mag, 47 km SE of Ōfunato, Japan

Posted by admin on August 22, 2025 0 Comments

A light earthquake magnitude 4.5 (ml/mb) has struck on Thursday, 47 kilometers (29 miles) from Ōfunato in Japan. The epicenter of the earthquake was roughly 67.529 km (42 miles) below the earth’s surface. Exact location of earthquake, 142.1173° East, 38.7778° North, depth 67.529 km. The 4.5-magnitude earthquake has occurred at 23:06:17 / 11:06 pm (local time epicenter). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Id of earthquake: us6000r2v6. Event ids that are associated: us6000r2v6. Exact time and date of earthquake 21/08/25 / 2025-08-21 23:06:17 / August 21, 2025 @ 11:06 pm UTC/GMT.

Closest city/cities or villages, with min 5000 pop, to hypocenter/epicentrum was Kogota, Mizusawa, Wakuya. Event epicenter was 82 km (51 miles) from Ishinomaki (c. 117 200 pop), 87 km (54 miles) from Ichinoseki (c. 63 000 pop), 94 km (58 miles) from Mizusawa (c. 61 300 pop), 60 km (37 miles) from Kamaishi (c. 43 100 pop), 48 km (30 miles) from Ōfunato (c. 35 400 pop), 88 km (54 miles) from Yamoto (c. 32 000 pop), 78 km (49 miles) from Tōno (c. 26 800 pop). Country/countries that might be effected, Japan (c. 127 288 000 pop).

There are an estimated 13,000 light earthquakes in the world each year. In the past 24 hours, there have been two, in the last 10 days two, in the past 30 days four and in the last 365 days fourty-seven earthquakes of magnitude 3.0 or greater that have been detected nearby. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage.

Did you feel anything?

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. Read more about the earthquake, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 47 km SE of Ōfunato, Japan. This information comes from the USGS Earthquake Notification Service.

More information

Parameter	Value	Description
Magnitude	4.5 mb	The magnitude for the event.
Longitude	142.1173° East	Decimal degrees longitude. Negative values for western longitudes.
Latitude	38.7778° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	67.529 km	Depth of the event in kilometers.
Place	47 km SE of Ōfunato, Japan	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2025-08-21 23:06:17	Time when the event occurred. UTC/GMT
Updated	2025-08-22 00:50:40	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	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	56	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	2.167	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.54 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	133	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	us6000r2v6	Id of event.
Event Code	6000r2v6	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us6000r2v6,	A comma-separated list of event ids that are associated to an event.

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Light earthquake 4.5 mag, 47 km SE of Ōfunato, Japan

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