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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4 mag has occurred near Westonaria in South Africa

Earthquake location -26.3954S, 27.5648WA light earthquake with magnitude 4 (ml/mb) was detected on Saturday, 11 kilometers (7 miles) from Westonaria in South Africa. Exact time and date of earthquake 17/03/18 / 2018-03-17 19:42:25 / March 17, 2018 @ 7:42 pm UTC/GMT. The temblor was picked up at 21:42:25 / 9:42 pm (local time epicenter). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). All ids that are associated to the event: us1000d82l. Unique identifier: us1000d82l. The epicenter was at a depth of 5 km (3 miles). Exact location of earthquake, longitude 27.5648 East, latitude -26.3954 South, depth = 5 km.

Close country/countries, South Africa (c. 49 000 000 pop) (That might be effected). Earthquake epicenter was 52 km (33 miles) from Johannesburg (c. 2 026 500 pop), 33 km (20 miles) from Soweto (c. 1 695 000 pop), 79 km (49 miles) from Benoni (c. 605 300 pop), 80 km (49 miles) from Tembisa (c. 511 700 pop), 47 km (29 miles) from Vereeniging (c. 474 700 pop), 72 km (45 miles) from Boksburg (c. 445 200 pop). Nearest cities/city/towns to hypocenter/epicentrum was Koster, Brits, Rustenburg (min 5000 pop).

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. In the past 24 hours, there have been one, in the last 10 days one, in the past 30 days three and in the last 365 days six earthquakes of magnitude 3.0 or greater that has struck near.

Did you feel anything?

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. 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: 11 km SW of Westonaria, South Africa.

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More information

Parameter Value Description
Magnitude 4 mb The magnitude for the event.
Longitude 27.5648° East Decimal degrees longitude. Negative values for western longitudes.
Latitude -26.3954° South Decimal degrees latitude. Negative values for southern latitudes.
Depth 5 km Depth of the event in kilometers.
Place 11km SW of Westonaria, South Africa Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2018-03-17 19:42:25 Time when the event occurred. UTC/GMT
Updated 2018-03-24 04:50:05 Time when the event was most recently updated. UTC/GMT
Timezone offset 120 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 2.245 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.75 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 83 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 us1000d82l Id of event.
Event Code 1000d82l An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us1000d82l, A comma-separated list of event ids that are associated to an event.

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