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Light World Earthquakes Magnitude 4-4.9

Light earthquake 4.2 mag, 23 km W of Semirom, Iran


Earthquake location 31.4282S, 51.3214WA light earthquake with magnitude 4.2 (ml/mb) was detected on Monday, 23 kilometers (14 miles) from Semirom in Iran. Exact location of event, longitude 51.3214 East, latitude 31.4282 North, depth = 10 km. The epicenter was at a depth of 10 km (6 miles). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The temblor was picked up at 21:41:28 / 9:41 pm (local time epicenter). Event id: us7000617h. Ids that are associated to the earthquake: us7000617h. Global date and time of event UTC/GMT: 21/10/19 / 2019-10-21 18:11:28 / October 21, 2019 @ 6:11 pm.

Epicenter of the event was 86 km (53 miles) from (c. 100 800 pop), 88 km (55 miles) from Yasuj (c. 96 800 pop), 60 km (37 miles) from Borūjen (c. 52 700 pop), 23 km (14 miles) from Semīrom (c. 27 200 pop). Closest city/cities or villages, with min 5000 pop, to hypocenter/epicentrum was Yasuj, , Borūjen. Close country/countries, Iran (c. 76 923 000 pop) (That might be effected).

There are an estimated 13,000 light earthquakes in the world each year. In the past 24 hours, there have been one, in the last 10 days one, in the past 30 days one and in the last 365 days four earthquakes of magnitude 3.0 or greater that was reported nearby. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage.

Did you feel the quake?

How did you react? Was there any damage to buildings? Leave a comment or report about shaking, activity and damage at your home, city and country. This information comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Date-Time, Location, Distances, Parameters and details about this quake, recorded: 23 km W of Semirom, Iran.

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More information

Parameter Value Description
Magnitude 4.2 mb The magnitude for the event.
Longitude 51.3214° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 31.4282° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 10 km Depth of the event in kilometers.
Place 23km W of Semirom, Iran Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2019-10-21 18:11:28 Time when the event occurred. UTC/GMT
Updated 2019-10-31 19:02:32 Time when the event was most recently updated. UTC/GMT
Timezone offset 210 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 5.96 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.96 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 159 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 us7000617h Id of event.
Event Code 7000617h An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us7000617h, A comma-separated list of event ids that are associated to an event.

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