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Light World Earthquakes Magnitude 4-4.9

Light earthquake 4 mag, 10 km W of Ixtapa, Mexico


Earthquake location 17.6666S, -101.737WA light earthquake with magnitude 4 (ml/mb) was reported 10 kilometers (6 miles) from Ixtapa in Mexico on Tuesday. Unique identifier: us10007qrx. Ids that are associated to the event: us10007qrx. Global date and time of event UTC/GMT: 20/12/16 / 2016-12-20 16:17:27 / December 20, 2016 @ 4:17 pm. The temblor was reported at 10:17:27 / 10:17 am (local time epicenter). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The earthquake occurred at a depth of 25.49 km (16 miles). Exact location of event, longitude -101.737 West, latitude 17.6666 North, depth = 25.49 km.

Event epicenter was 61 km (38 miles) from Ciudad Lázaro Cárdenas (c. 84 000 pop), 20 km (12 miles) from Ixtapa-Zihuatanejo (c. 61 300 pop), 64 km (40 miles) from Guacamayas (c. 39 400 pop), 52 km (32 miles) from Petatlán (c. 21 000 pop), 63 km (39 miles) from La Orilla (c. 20 100 pop), 70 km (44 miles) from Buenos Aires (c. 9 900 pop). Closest city/cities/towns to epicentrum/hypocenter was Buenos Aires, Guacamayas, La Orilla (min 5000 pop). Nearby country/countries that might be effected, Mexico (c. 112 469 000 pop).

In the past 24 hours, there have been one, in the last 10 days one, in the past 30 days five and in the last 365 days seven earthquakes of magnitude 3.0 or greater that was reported nearby. 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.

Did you feel the quake?

Were you asleep? Was it difficult to stand and/or walk? Leave a comment or report about shaking, activity and damage at your city, home and country. Read more about the earthquake, Location, Distances, Seismometer information, Date-Time, Parameters and details about this quake, reported near: 10 km W of Ixtapa, 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 -101.737° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 17.6666° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 25.49 km Depth of the event in kilometers.
Place 10km W of Ixtapa, Mexico Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2016-12-20 16:17:27 Time when the event occurred. UTC/GMT
Updated 2017-01-18 21:05:58 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 0.266 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 1.04 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 179 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 us10007qrx Id of event.
Event Code 10007qrx An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us10007qrx, A comma-separated list of event ids that are associated to an event.

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