M 5.6 Earthquake 154 km SSE of Teluk Dalam, Indonesia
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A magnitude 5.6 mww earthquake occurred 154 km SSE of Teluk Dalam, Indonesia, at a depth of 10 km.
What this USGS earthquake report tells you, and what most readers miss
This notice was issued by USGS on August 18, 2026 and geographically references Indonesia. Its severity classification of "medium" signals how the issuing agency weighs the risk of harm if no action is taken - "critical" and "high" tier alerts typically carry direct consumer actions, while "medium" and "low" tend toward informational guidance or monitoring advisories. The category it belongs to - Earthquakes - determines the monitoring protocol behind it, which shapes what follow-up action (checking for structural damage, watching for aftershocks, reviewing local building codes) is relevant and which agency holds authority over the assessment.
Most readers skim a notice like this, check whether they are personally affected, and move on. The more useful lens is to verify its scope, source, and timestamp, then compare related notices without assuming that one record proves a broader trend.
Areazine pairs this record with the original agency URL so you can check the primary source before acting. Its related labels are earthquake, seismic, usgs, Indonesia.
What Happened
A M 5.6 mww earthquake struck 154 km SSE of Teluk Dalam, Indonesia, on 2026-07-18 at 12:42:20 UTC (Unix time 1787032940229). The event was reviewed by USGS and had a depth of 10 km.
Location Details
The epicenter was located at latitude -0.6858, longitude 98.416. This places the event 154 km south-southeast of Teluk Dalam. A depth of 10 km is classified as shallow (less than 20 km).
Impact Assessment
No felt reports were recorded. The Modified Mercalli Intensity (MMI) was estimated at 5.403. There was no tsunami advisory (tsunami field = 0) and no alert level assigned.
What You Should Know
Earthquakes of this magnitude are considered moderate and can cause damage to poorly constructed buildings. Residents in the region should follow standard earthquake safety procedures.
Source
Original source: USGS Official Notice ↗
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Common questions about this USGS earthquake report.