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Light World Earthquakes Magnitude 4-4.9

Light earthquake 4 mag, 42 km S of San Francisco del Mar, Mexico

Posted by admin on September 22, 2017 0 Comments

Earthquake location 15.854S, -94.601WA light earthquake magnitude 4 (ml/mb) has struck on Saturday, 42 kilometers (26 miles) from San Francisco del Mar in Mexico. Global date and time of event UTC/GMT: 09/09/17 / 2017-09-09 11:22:42 / September 9, 2017 @ 11:22 am. The epicenter was at a depth of 69.04 km (43 miles). Event id: us2000ait2. Ids that are associated to the earthquake: us2000ait2. Exact location of earthquake, -94.601° West, 15.854° North, depth 69.04 km. The 4-magnitude earthquake was detected at 05:22:42 / 5:22 am (local time epicenter). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist).

Nearest city/cities or towns, with min 5000 pop, to epicentrum/hypocenter was Asunción Ixtaltepec, Santo Domingo Tehuantepec, Arriaga. Country/countries that might be effected, Mexico (c. 112 469 000 pop). Epicenter of the earthquake was 74 km (46 miles) from Salina Cruz (c. 73 600 pop), 79 km (49 miles) from Juchitán de Zaragoza (c. 67 600 pop), 86 km (54 miles) from Santo Domingo Tehuantepec (c. 37 400 pop), 86 km (53 miles) from Arriaga (c. 22 800 pop), 73 km (45 miles) from Unión Hidalgo (c. 12 700 pop), 67 km (41 miles) from Chahuite (c. 9 800 pop).

In the past 24 hours, there have been one hundred and fifty-seven, in the last 10 days one hundred and eighty, in the past 30 days one hundred and eighty and in the last 365 days one hundred and ninety-eight 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.

Questions or comments?

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: 42 km S of San Francisco del Mar, Mexico.

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More information

Parameter Value Description
Magnitude 4 mb The magnitude for the event.
Longitude -94.601° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 15.854° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 69.04 km Depth of the event in kilometers.
Place 42km S of San Francisco 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 2017-09-09 11:22:42 Time when the event occurred. UTC/GMT
Updated 2017-09-22 09:22:34 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 3.033 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.25 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 188 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 us2000ait2 Id of event.
Event Code 2000ait2 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us2000ait2, A comma-separated list of event ids that are associated to an event.

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