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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.5 mag was detected near Iwaki in Japan


Earthquake location 36.7866S, 141.3019WA light earthquake with magnitude 4.5 (ml/mb) was detected on Friday, 47 kilometers (29 miles) from Iwaki in Japan. Exact location of event, depth 43.124 km, 141.3019° East, 36.7866° North. The temblor was detected at 14:44:31 / 2:44 pm (local time epicenter). The epicenter of the earthquake was roughly 43.124 km (27 miles) below the earth’s surface. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). All ids that are associated to the event: us7000q12t. Unique identifier: us7000q12t. Exact time and date of event in UTC/GMT: 23/05/25 / 2025-05-23 14:44:31 / May 23, 2025 @ 2:44 pm.

Nearby country/countries that might be effected, Japan (c. 127 288 000 pop). Closest city/cities or villages, with min 5000 pop, to hypocenter/epicentrum was Mito-shi, Ishikawa, Daigo. Epicenter of the earthquake was 47 km (29 miles) from Iwaki (c. 357 300 pop), 91 km (57 miles) from Mito-shi (c. 246 500 pop), 62 km (38 miles) from Hitachi (c. 186 300 pop), 81 km (50 miles) from Hitachi-Naka (c. 156 800 pop), 82 km (51 miles) from Katsuta (c. 156 000 pop), 49 km (31 miles) from Kitaibaraki (c. 50 800 pop), 75 km (46 miles) from Funaishikawa (c. 35 300 pop).

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

How would you describe the shaking?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity 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 Iwaki, Japan. This information comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4.5 mb The magnitude for the event.
Longitude 141.3019° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 36.7866° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 43.124 km Depth of the event in kilometers.
Place 47 km SE of Iwaki, Japan Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2025-05-23 14:44:31 Time when the event occurred. UTC/GMT
Updated 2025-06-17 13:42:34 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 70 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 1.679 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.8 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 115 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 us7000q12t Id of event.
Event Code 7000q12t An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us7000q12t, A comma-separated list of event ids that are associated to an event.

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