Light earthquake, 4.5 mag has occurred near Port Blair in India

A light earthquake magnitude 4.5 (ml/mb) has struck on Monday, 86 kilometers (53 miles) from Port Blair in India. Exact time and date of earthquake 21/07/25 / 2025-07-21 18:00:59 / July 21, 2025 @ 6:00 pm UTC/GMT. Event id: us6000qtz9. Ids that are associated to the earthquake: us6000qtz9. The earthquake was roughly at a depth of 110.568 km (69 miles). Exact location of event, depth 110.568 km, 93.1986° East, 11.0245° North. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). The 4.5-magnitude earthquake was detected at 18:00:59 / 6:00 pm (local time epicenter).

Country/countries that might be effected, India (c. 1 173 108 000 pop). Closest city/cities/towns to epicentrum/hypocenter was Bamboo Flat, Port Blair (min 5000 pop). Earthquake epicenter was 87 km (54 miles) from Port Blair (c. 112 100 pop), 92 km (57 miles) from Bamboo Flat (c. 7 400 pop).

Each year there are an estimated 13,000 light quakes 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 one, in the last 10 days one, in the past 30 days two and in the last 365 days nine earthquakes of magnitude 3.0 or greater that have been detected in the same area.

How would you describe the shaking?

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. 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: 86 km SE of Port Blair, India.

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Parameter	Value	Description
Magnitude	4.5 mb	The magnitude for the event.
Longitude	93.1986° East	Decimal degrees longitude. Negative values for western longitudes.
Latitude	11.0245° North	Decimal degrees latitude. Negative values for southern latitudes.
Depth	110.568 km	Depth of the event in kilometers.
Place	86 km SE of Port Blair, India	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2025-07-21 18:00:59	Time when the event occurred. UTC/GMT
Updated	2025-07-21 18:58:00	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	30	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	6.616	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.83 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	77	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	us6000qtz9	Id of event.
Event Code	6000qtz9	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us6000qtz9,	A comma-separated list of event ids that are associated to an event.

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Light earthquake, 4.5 mag has occurred near Port Blair in India

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