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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4 mag has occurred near Salina Cruz in Mexico

Earthquake location 15.7172S, -95.0549WA light earthquake magnitude 4 (ml/mb) strikes 52 kilometers (32 miles) from Salina Cruz in Mexico on Saturday. Unique identifier: us1000dx71. Ids that are associated to the event: us1000dx71. Exact location of event, depth 36.07 km, -95.0549° West, 15.7172° North. The epicenter of the earthquake was roughly 36.07 km (22 miles) below the earth’s surface. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The temblor was picked up at 21:52:04 / 9:52 pm (local time epicenter). Exact time and date of earthquake 29/04/18 / 2018-04-29 03:52:04 / April 29, 2018 @ 3:52 am UTC/GMT.

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 Asunción Ixtaltepec, Unión Hidalgo, Las Amilpas. Epicenter of the event was 54 km (34 miles) from Salina Cruz (c. 73 600 pop), 80 km (50 miles) from Juchitán de Zaragoza (c. 67 600 pop), 70 km (44 miles) from Santo Domingo Tehuantepec (c. 37 400 pop), 87 km (54 miles) from Unión Hidalgo (c. 12 700 pop), 86 km (53 miles) from Las Amilpas (c. 8 800 pop), 85 km (53 miles) from El Espinal (c. 7 800 pop).

There are an estimated 13,000 light quakes in the world each year. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. In the past 24 hours, there have been two, in the last 10 days three, in the past 30 days twelve and in the last 365 days three hundred and fifty-seven earthquakes of magnitude 3.0 or greater that has struck near.

Questions or comments?

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: 52 km SSE of Salina Cruz, Mexico. 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 -95.0549° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 15.7172° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 36.07 km Depth of the event in kilometers.
Place 52km SSE of Salina Cruz, Mexico Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2018-04-29 03:52:04 Time when the event occurred. UTC/GMT
Updated 2018-05-09 01:34:23 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 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 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 1.015 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.09 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 150 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 us1000dx71 Id of event.
Event Code 1000dx71 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us1000dx71, A comma-separated list of event ids that are associated to an event.

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