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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4 mag was detected near Ishigaki in Japan

Posted by admin on May 30, 2025 0 Comments

Earthquake location 22.8891S, 123.5793WA light earthquake magnitude 4 (ml/mb) strikes 171 km SSW of Ishigaki, Japan (106 miles) on Sunday. Event ids that are associated to the earthquake: us7000q1lf. Id of event: us7000q1lf. Global date and time of event UTC/GMT: 11/05/25 / 2025-05-11 08:29:39 / May 11, 2025 @ 8:29 am. The 4-magnitude earthquake was detected at 08:29:39 / 8:29 am (local time epicenter). Exact location of event, longitude 123.5793 East, latitude 22.8891 North, depth = 10 km. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The epicenter of the earthquake was roughly 10 km (6 miles) below the earth’s surface.

Each year there are an estimated 13,000 light earthquakes in the world. In the past 24 hours, there have been one, in the last 10 days one, in the past 30 days two and in the last 365 days ten 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.

Questions or comments?

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. The information in this article comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, detected near: 171 km SSW of Ishigaki, Japan.

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More information

Parameter Value Description
Magnitude 4 mb The magnitude for the event.
Longitude 123.5793° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 22.8891° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 10 km Depth of the event in kilometers.
Place 171 km SSW of Ishigaki, Japan Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2025-05-11 08:29:39 Time when the event occurred. UTC/GMT
Updated 2025-05-30 05:19:50 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 20 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 1.6 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.92 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 238 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 us7000q1lf Id of event.
Event Code 7000q1lf An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us7000q1lf, A comma-separated list of event ids that are associated to an event.

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