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Light World Earthquakes Magnitude 4-4.9

Light earthquake, 4.2 mag strikes near Hengchun in Taiwan


Earthquake location 21.2783S, 121.0867WA light earthquake magnitude 4.2 (ml/mb) has struck on Wednesday, 87 kilometers (54 miles) from Hengchun in Taiwan. Date and time of earthquake in UTC/GMT: 22/01/25 / 2025-01-22 02:30:27 / January 22, 2025 @ 2:30 am. The epicenter of the earthquake was roughly 31.883 km (20 miles) below the earth’s surface. Id of earthquake: us7000pac1. Event ids that are associated: us7000pac1. The 4.2-magnitude earthquake was detected at 02:30:27 / 2:30 am (local time epicenter). A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact location of event, longitude 121.0867 East, latitude 21.2783 North, depth = 31.883 km.

Close country/countries that might be effected, Taiwan (c. 22 894 000 pop). Closest city/cities or villages, with min 5000 pop, to hypocenter/epicentrum was Hengchun. Epicenter of the earthquake was 88 km (55 miles) from Hengchun (c. 31 300 pop).

Each year there are an estimated 13,000 light earthquakes in the world. Earthquakes 4.0 to 5.0 are often felt, but only causes minor damage. In the past 24 hours, there have been four, in the last 10 days four, in the past 30 days eight and in the last 365 days eighteen earthquakes of magnitude 3.0 or greater that has struck near.

Did you feel it?

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: 87 km SSE of Hengchun, Taiwan.

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More information

Parameter Value Description
Magnitude 4.2 mb The magnitude for the event.
Longitude 121.0867° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 21.2783° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 31.883 km Depth of the event in kilometers.
Place 87 km SSE of Hengchun, Taiwan Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2025-01-22 02:30:27 Time when the event occurred. UTC/GMT
Updated 2025-02-11 23:36:29 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 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 35 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 1.532 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.57 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 113 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 us7000pac1 Id of event.
Event Code 7000pac1 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us7000pac1, A comma-separated list of event ids that are associated to an event.

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