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Light earthquake: M4.2 quake has struck near San Marcos in Mexico

Earthquake location 16.6342S, -99.5801WA light earthquake with magnitude 4.2 (ml/mb) was reported 30 kilometers (19 miles) from San Marcos in Mexico on Tuesday. The temblor was picked up at 06:45:12 / 6:45 am (local time epicenter). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Global time and date of event 10/10/17 / 2017-10-10 12:45:12 / October 10, 2017 @ 12:45 pm UTC/GMT. Exact location, longitude -99.5801° West, latitude 16.6342° North, depth = 12 km. The epicenter of the earthquake was roughly 12 km (7 miles) below the earth’s surface. Event id: us2000b3hy. Ids that are associated to the earthquake: us2000b3hy.

Close country/countries that might be effected, Mexico (c. 112 469 000 pop). Closest city/cities or villages, with min 5000 pop, to hypocenter/epicentrum was San Luis Acatlán, Marquelia, El Ocotito. Epicenter of the earthquake was 42 km (26 miles) from Acapulco de Juárez (c. 652 100 pop), 68 km (42 miles) from Coyuca de Benítez (c. 12 500 pop), 27 km (17 miles) from San Marcos (c. 12 300 pop), 59 km (37 miles) from Tierra Colorada (c. 10 200 pop), 63 km (39 miles) from Ayutla de los Libres (c. 9 900 pop), 50 km (31 miles) from Cruz Grande (c. 9 900 pop).

In the past 24 hours, there have been one, in the last 10 days one, in the past 30 days two 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.

Did you feel anything?

Did objects rattle, topple over, or fall off shelves? Leave a comment or report about activity, shaking and damage at your home, country and city. 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: 30 km SW of San Marcos, Mexico.

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More information

Parameter Value Description
Magnitude 4.2 mb The magnitude for the event.
Longitude -99.5801° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 16.6342° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 12 km Depth of the event in kilometers.
Place 30km SW of San Marcos, Mexico Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2017-10-10 12:45:12 Time when the event occurred. UTC/GMT
Updated 2017-11-06 09:12:32 Time when the event was most recently updated. UTC/GMT
Timezone offset -360 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 271 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 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 0.378 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.87 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 186 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 us2000b3hy Id of event.
Event Code 2000b3hy An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us2000b3hy, A comma-separated list of event ids that are associated to an event.

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