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Light earthquake, 4.1 mag was detected near Bonin Islands, Japan region

Posted by admin on October 6, 2025 0 Comments

Earthquake location 27.2131S, 140.2644WA light earthquake with magnitude 4.1 (ml/mb) was detected on Monday, Bonin Islands, Japan region (0 miles). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact location of event, longitude 140.2644 East, latitude 27.2131 North, depth = 442.455 km. The temblor was reported at 20:02:43 / 8:02 pm (local time epicenter). Exact time and date of event in UTC/GMT: 06/10/25 / 2025-10-06 20:02:43 / October 6, 2025 @ 8:02 pm. The epicenter was at a depth of 442.455 km (275 miles). Unique identifier: us6000rf64. Ids that are associated to the event: us6000rf64.

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

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. This information comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Date-Time, Location, Distances, Parameters and details about this quake, recorded: Bonin Islands, Japan region.

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More information

Parameter Value Description
Magnitude 4.1 mb The magnitude for the event.
Longitude 140.2644° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 27.2131° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 442.455 km Depth of the event in kilometers.
Place Bonin Islands, Japan region Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2025-10-06 20:02:43 Time when the event occurred. UTC/GMT
Updated 2025-10-06 20:17:41 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 259 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 42 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 1.715 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.99 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 94 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 us6000rf64 Id of event.
Event Code 6000rf64 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us6000rf64, A comma-separated list of event ids that are associated to an event.

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