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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.1 mag was detected near western Indian-Antarctic Ridge

Posted by admin on July 23, 2025 0 Comments

Earthquake location -48.9779S, 121.8177WA light earthquake with magnitude 4.1 (ml/mb) was reported western Indian-Antarctic Ridge (0 miles) on Sunday. Event id: us7000qbtv. Ids that are associated to the earthquake: us7000qbtv. Exact time and date of earthquake 29/06/25 / 2025-06-29 08:54:21 / June 29, 2025 @ 8:54 am UTC/GMT. Exact location of earthquake, longitude 121.8177 East, latitude -48.9779 South, depth = 10 km. The 4.1-magnitude earthquake has occurred at 08:54:21 / 8:54 am (local time epicenter). The earthquake occurred at a depth of 10 km (6 miles) below the earth’s surface. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist).

There are an estimated 13,000 light earthquakes in the world each year. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. 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 nine earthquakes of magnitude 3.0 or greater that have been detected in the same area.

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: western Indian-Antarctic Ridge.

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More information

Parameter Value Description
Magnitude 4.1 mb The magnitude for the event.
Longitude 121.8177° East Decimal degrees longitude. Negative values for western longitudes.
Latitude -48.9779° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 10 km Depth of the event in kilometers.
Place western Indian-Antarctic Ridge Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2025-06-29 08:54:21 Time when the event occurred. UTC/GMT
Updated 2025-07-23 06:37:50 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 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 15 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 22.659 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 110 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 us7000qbtv Id of event.
Event Code 7000qbtv An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us7000qbtv, A comma-separated list of event ids that are associated to an event.

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