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Light earthquake: M4.2 quake has struck near San Dionisio del Mar in Mexico


Earthquake location 16.1985S, -94.8032WA light earthquake with magnitude 4.2 (ml/mb) was detected on Tuesday, 15 kilometers (9 miles) from San Dionisio del Mar in Mexico. The 4.2-magnitude earthquake was detected at 05:06:18 / 5:06 am (local time epicenter). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact location, longitude -94.8032° West, latitude 16.1985° North, depth = 37.2 km. All ids that are associated to the event: us2000akpc. Unique identifier: us2000akpc. The epicenter was at a depth of 37.2 km (23 miles). Global date and time of event UTC/GMT: 12/09/17 / 2017-09-12 11:06:18 / September 12, 2017 @ 11:06 am.

Earthquake epicenter was 43 km (26 miles) from Salina Cruz (c. 73 600 pop), 35 km (22 miles) from Juchitán de Zaragoza (c. 67 600 pop), 49 km (30 miles) from Santo Domingo Tehuantepec (c. 37 400 pop), 53 km (33 miles) from San Jerónimo Ixtepec (c. 23 200 pop), 80 km (50 miles) from Matías Romero (c. 21 100 pop), 31 km (19 miles) from Unión Hidalgo (c. 12 700 pop). Nearest cities/city/towns to hypocenter/epicentrum was Colonia Rincón Viejo, Matías Romero, Jalapa (min 5000 pop). Nearby country/countries that might be effected, Mexico (c. 112 469 000 pop).

In the past 24 hours, there have been seven, in the last 10 days sixty-nine, in the past 30 days sixty-nine and in the last 365 days eighty-six earthquakes of magnitude 3.0 or greater that have been detected nearby. Every year there are an estimated 13,000 light earthquakes in the world. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage.

Did you feel the quake?

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: 15 km SSW of San Dionisio del Mar, Mexico.

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More information

Parameter Value Description
Magnitude 4.2 mb The magnitude for the event.
Longitude -94.8032° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 16.1985° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 37.2 km Depth of the event in kilometers.
Place 15km SSW of San Dionisio del Mar, Mexico Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2017-09-12 11:06:18 Time when the event occurred. UTC/GMT
Updated 2017-09-12 12:30:15 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 3.296 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.85 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 168 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 us2000akpc Id of event.
Event Code 2000akpc An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us2000akpc, A comma-separated list of event ids that are associated to an event.

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