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Light World Earthquakes Magnitude 4-4.9

Light earthquake: M4.6 quake has struck near San Juan in Peru


Earthquake location -15.9789S, -75.4902WA light earthquake with magnitude 4.6 (ml/mb) was reported 76 kilometers (47 miles) from San Juan in Peru on Monday. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The 4.6-magnitude earthquake has occurred at 18:38:36 / 6:38 pm (local time epicenter). Exact location, longitude -75.4902° West, latitude -15.9789° South, depth = 10 km. The epicenter of the earthquake was roughly 10 km (6 miles) below the earth’s surface. Unique identifier: us6000rhbu. Ids that are associated to the event: us6000rhbu. Global time and date of event 22/09/25 / 2025-09-22 18:38:36 / September 22, 2025 @ 6:38 pm UTC/GMT.

Close country/countries that might be effected, Peru (c. 29 907 000 pop). Closest city/cities/towns to epicentrum/hypocenter was Minas de Marcona (min 5000 pop). Epicenter of the earthquake was 94 km (59 miles) from Minas de Marcona (c. 15 500 pop).

In the past 24 hours, there have been five, in the last 10 days five, in the past 30 days eight and in the last 365 days seventeen 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. There are an estimated 13,000 light earthquakes in the world each year.

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. This data comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, that has occurred near: 76 km SSW of San Juan, Peru.

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More information

Parameter Value Description
Magnitude 4.6 mb The magnitude for the event.
Longitude -75.4902° West Decimal degrees longitude. Negative values for western longitudes.
Latitude -15.9789° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 10 km Depth of the event in kilometers.
Place 76 km SSW of San Juan, Peru Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2025-09-22 18:38:36 Time when the event occurred. UTC/GMT
Updated 2025-10-16 18:37:22 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 326 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 29 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 4.179 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.62 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 139 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 us6000rhbu Id of event.
Event Code 6000rhbu An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us6000rhbu, A comma-separated list of event ids that are associated to an event.

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