Light earthquake, 4.5 mag has occurred near Biak in Indonesia

A light earthquake with magnitude 4.5 (ml/mb) was reported 158 km ESE of Biak, Indonesia (98 miles) on Thursday. The temblor was detected at 19:48:03 / 7:48 pm (local time epicenter). Exact location of event, depth 27.436 km, 137.3545° East, -1.8147° South. A tsunami warning has not been issued (Does not indicate if a tsunami actually did or will exist). Id of earthquake: us7000qtwe. Event ids that are associated: us7000qtwe. The epicenter was at a depth of 27.436 km (17 miles). Date and time of earthquake in UTC/GMT: 04/09/25 / 2025-09-04 19:48:03 / September 4, 2025 @ 7:48 pm.

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 one, in the last 10 days one, in the past 30 days one and in the last 365 days three earthquakes of magnitude 3.0 or greater that has struck near.

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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. Read more about the earthquake, Distances, Seismometer information, Date-Time, Parameters, Location and details about this quake, that has struck: 158 km ESE of Biak, Indonesia. This data comes from the USGS Earthquake Notification Service.

Biak Indonesia

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Parameter	Value	Description
Magnitude	4.5 mb	The magnitude for the event.
Longitude	137.3545° East	Decimal degrees longitude. Negative values for western longitudes.
Latitude	-1.8147° South	Decimal degrees latitude. Negative values for southern latitudes.
Depth	27.436 km	Depth of the event in kilometers.
Place	158 km ESE of Biak, Indonesia	Textual description of named geographic region near to the event. This may be a city name, or a Flinn-Engdahl Region name.
Time	2025-09-04 19:48:03	Time when the event occurred. UTC/GMT
Updated	2025-09-28 15:39:35	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	25	The total number of Number of seismic stations which reported P- and S-arrival times for this earthquake.
Horizontal Distance	0.838	Horizontal distance from the epicenter to the nearest station (in degrees).
Root Mean Square	0.49 sec	The root-mean-square (RMS) travel time residual, in sec, using all weights.
Azimuthal Gap	69	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	us7000qtwe	Id of event.
Event Code	7000qtwe	An identifying code assigned by, and unique from, the corresponding source for the event.
Event IDS	,us7000qtwe,	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 Biak in Indonesia

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