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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.2 mag was detected near La Unión in Mexico


Earthquake location 18.052S, -101.9129WA light earthquake with magnitude 4.2 (ml/mb) was detected on Friday, 13 kilometers (8 miles) from La Unión in Mexico. Global time and date of event 28/03/25 / 2025-03-28 03:34:41 / March 28, 2025 @ 3:34 am UTC/GMT. The earthquake occurred at a depth of 50.785 km (32 miles) below the earth’s surface. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Event id: us6000q43s. Ids that are associated to the earthquake: us6000q43s. The temblor was picked up at 03:34:41 / 3:34 am (local time epicenter). Exact location of event, longitude -101.9129 West, latitude 18.052 North, depth = 50.785 km.

Event epicenter was 34 km (21 miles) from Ciudad Lázaro Cárdenas (c. 84 000 pop), 59 km (37 miles) from Ixtapa-Zihuatanejo (c. 61 300 pop), 32 km (20 miles) from Guacamayas (c. 39 400 pop), 89 km (55 miles) from Petatlán (c. 21 000 pop), 34 km (21 miles) from La Orilla (c. 20 100 pop), 80 km (50 miles) from La Mira Tumbiscatio (c. 14 500 pop). Closest city/cities/towns to epicentrum/hypocenter was Petatlán, San Jeronimito, La Mira Tumbiscatio (min 5000 pop). Close country/countries, Mexico (c. 112 469 000 pop) (That might be effected).

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. 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 has struck near.

Did you feel anything?

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. 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: 13 km WNW of La Unión, Mexico.

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More information

Parameter Value Description
Magnitude 4.2 mb The magnitude for the event.
Longitude -101.9129° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 18.052° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 50.785 km Depth of the event in kilometers.
Place 13 km WNW of La Unión, Mexico Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2025-03-28 03:34:41 Time when the event occurred. UTC/GMT
Updated 2025-04-10 21:31:08 Time when the event was most recently updated. UTC/GMT
Timezone offset Timezone offset from UTC in minutes at the event epicenter.
Felt 1 The total number of felt reports
CDI 3.1 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 272 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 36 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0.805 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.23 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 158 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 us6000q43s Id of event.
Event Code 6000q43s An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us6000q43s, A comma-separated list of event ids that are associated to an event.

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