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Light earthquake: M4 quake has struck near San Antonio in Chile

Posted by admin on August 28, 2025 0 Comments

Earthquake location -33.8306S, -72.201WA light earthquake with magnitude 4 (ml/mb) was reported 60 kilometers (37 miles) from San Antonio in Chile on Wednesday. Unique identifier: us7000qr9y. Ids that are associated to the event: us7000qr9y. Exact location of earthquake, longitude -72.201 West, latitude -33.8306 South, depth = 27.279 km. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The temblor was reported at 11:41:36 / 11:41 am (local time epicenter). The earthquake was roughly at a depth of 27.279 km (17 miles). Exact time and date of earthquake 27/08/25 / 2025-08-27 11:41:36 / August 27, 2025 @ 11:41 am UTC/GMT.

Country/countries that might be effected, Chile (c. 16 746 000 pop). Closest city/cities or villages, with min 5000 pop, to hypocenter/epicentrum was Cartagena, San Antonio. The epicenter was 61 km (38 miles) from San Antonio (c. 85 700 pop), 63 km (39 miles) from Cartagena (c. 16 900 pop).

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 sixteen earthquakes of magnitude 3.0 or greater that has occurred nearby. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. There are an estimated 13,000 light quakes in the world each year.

How would you describe the shaking?

How did you respond? Did any furniture slide, topple over, or become displaced? Leave a comment or report about activity, shaking 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: 60 km WSW of San Antonio, Chile. This information comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4 mb The magnitude for the event.
Longitude -72.201° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -33.8306° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 27.279 km Depth of the event in kilometers.
Place 60 km WSW of San Antonio, Chile Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2025-08-27 11:41:36 Time when the event occurred. UTC/GMT
Updated 2025-08-28 05:29:05 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 19 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0.519 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.45 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 188 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 us7000qr9y Id of event.
Event Code 7000qr9y An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us7000qr9y, A comma-separated list of event ids that are associated to an event.

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