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Light World Earthquakes Magnitude 4-4.9

Light earthquake 4.5 mag, 27 km S of Basay, Philippines

Posted by admin on September 17, 2025 0 Comments

Earthquake location 9.1609S, 122.607WA light earthquake with magnitude 4.5 (ml/mb) was detected on Thursday, 27 kilometers (17 miles) from Basay in Philippines. The temblor was picked up at 00:43:36 / 12:43 am (local time epicenter). Date and time of earthquake in UTC/GMT: 21/08/25 / 2025-08-21 00:43:36 / August 21, 2025 @ 12:43 am. Unique identifier: us7000qwh3. Ids that are associated to the event: us7000qwh3. The earthquake occurred at a depth of 10 km (6 miles) below the earth’s surface. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Exact location of event, longitude 122.607 East, latitude 9.1609 North, depth = 10 km.

Nearby country/countries, Philippines (c. 99 900 000 pop) (That might be effected). Closest city/cities or villages, with min 5000 pop, to hypocenter/epicentrum was Kabankalan, Dancalan, Guiljungan. The epicenter was 95 km (59 miles) from Kabankalan (c. 136 500 pop), 78 km (49 miles) from Dumaguete (c. 113 500 pop), 74 km (46 miles) from Bais (c. 65 600 pop), 72 km (45 miles) from Tanjay (c. 39 200 pop), 31 km (19 miles) from Bayawan (c. 36 100 pop), 78 km (48 miles) from Sibulan (c. 28 100 pop), 34 km (21 miles) from Santa Catalina (c. 26 500 pop).

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

Questions or comments?

Were you asleep? Was it difficult to stand and/or walk? Leave a comment or report about shaking, activity and damage at your city, home and country. Read more about the earthquake, Distances, Seismometer information, Date-Time, Parameters, Location and details about this quake, that has struck: 27 km S of Basay, Philippines. This data comes from the USGS Earthquake Notification Service.

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More information

Parameter Value Description
Magnitude 4.5 mb The magnitude for the event.
Longitude 122.607° East Decimal degrees longitude. Negative values for western longitudes.
Latitude 9.1609° North Decimal degrees latitude. Negative values for southern latitudes.
Depth 10 km Depth of the event in kilometers.
Place 27 km S of Basay, Philippines Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time 2025-08-21 00:43:36 Time when the event occurred. UTC/GMT
Updated 2025-09-17 03:41:42 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 312 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 22 The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance 3.602 Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square 0.74 sec The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap 100 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 us7000qwh3 Id of event.
Event Code 7000qwh3 An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS ,us7000qwh3, A comma-separated list of event ids that are associated to an event.

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