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Light earthquake: M4 quake has struck near Tonala in Mexico


Earthquake location 16.0467S, -93.6829WA light earthquake with magnitude 4 (ml/mb) was detected on Saturday, 8 kilometers (5 miles) from Tonala in Mexico. Exact time and date of event in UTC/GMT: 06/01/18 / 2018-01-06 08:22:01 / January 6, 2018 @ 8:22 am. The 4-magnitude earthquake was detected at 02:22:01 / 2:22 am (local time epicenter). The earthquake occurred at a depth of 111.46 km (69 miles) below the earth’s surface. All ids that are associated to the event: us1000c1e8. Unique identifier: us1000c1e8. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact location, longitude -93.6829° West, latitude 16.0467° North, depth = 111.46 km.

Epicenter of the event was 71 km (44 miles) from Cintalapa de Figueroa (c. 33 500 pop), 9 km (6 miles) from Tonalá (c. 32 900 pop), 86 km (53 miles) from Ocozocoautla de Espinosa (c. 31 600 pop), 32 km (20 miles) from Arriaga (c. 22 800 pop), 65 km (40 miles) from Pijijiapan (c. 15 100 pop), 89 km (56 miles) from Suchiapa (c. 13 300 pop). Close country/countries that might be effected, Mexico (c. 112 469 000 pop). Nearest cities/city/villages to epicentrum/hypocenter was Suchiapa, Ocozocoautla de Espinosa, Santo Domingo Zanatepec (min 5000 pop).

In the past 24 hours, there have been one, in the last 10 days five, in the past 30 days eight and in the last 365 days two hundred and fifty earthquakes of magnitude 3.0 or greater that has occurred 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 it?

What was your situation during the earthquake? Leave a comment or report about damage, shaking and activity 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: 8 km ESE of Tonala, 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 -93.6829° West Decimal degrees longitude. Negative values for western longitudes.
Latitude 16.0467° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 111.46 km Depth of the event in kilometers.
Place 8km ESE of Tonala, Mexico Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2018-01-06 08:22:01 Time when the event occurred. UTC/GMT
Updated 2018-01-06 09:02:29 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 1.503 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.98 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 148 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 us1000c1e8 Id of event.
Event Code 1000c1e8 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us1000c1e8, A comma-separated list of event ids that are associated to an event.

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