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Light World Earthquakes Magnitude 4-4.9

Light earthquake 4.3 mag, 37 km N of Basco, Philippines


Earthquake location 20.7853S, 121.9887WA light earthquake magnitude 4.3 (ml/mb) has struck on Tuesday, 37 kilometers (23 miles) from Basco in Philippines. The 4.3-magnitude earthquake was detected at 11:55:59 / 11:55 am (local time epicenter). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Date and time of earthquake in UTC/GMT: 04/08/20 / 2020-08-04 11:55:59 / August 4, 2020 @ 11:55 am. The earthquake was roughly at a depth of 157.86 km (98 miles). Exact location of event, depth 157.86 km, 121.9887° East, 20.7853° North. Unique identifier: us6000b952. Ids that are associated to the event: us6000b952.

Epicenter of the event was 37 km (23 miles) from Basco (c. 7 300 pop). Close country/countries, Philippines (c. 99 900 000 pop) (That might be effected). Nearest cities/city/villages to epicentrum/hypocenter was Basco (min 5000 pop).

In the past 24 hours, there have been one, in the last 10 days one, in the past 30 days two and in the last 365 days seventeen 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. There are an estimated 13,000 light quakes 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. The information in this article comes from the USGS Earthquake Notification Service. Read more about the earthquake, Seismometer information, Distances, Parameters, Date-Time, Location and details about this quake, detected near: 37 km N of Basco, Philippines.

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More information

Parameter Value Description
Magnitude 4.3 mb The magnitude for the event.
Longitude 121.9887° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 20.7853° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 157.86 km Depth of the event in kilometers.
Place 37 km N of Basco, Philippines Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2020-08-04 11:55:59 Time when the event occurred. UTC/GMT
Updated 2020-08-14 07:39:41 Time when the event was most recently updated. UTC/GMT
Timezone offset 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 284 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 2.191 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.56 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 117 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 us6000b952 Id of event.
Event Code 6000b952 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us6000b952, A comma-separated list of event ids that are associated to an event.

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