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Indonesia · West Sumatra

M4.2 Earthquake near Basa Ampek Balai Tapan, West Sumatra (Indonesia)

UTC time: 2026-07-21 06:49:09 UTC Local time: —
Magnitude
M4.2
Depth
9.0 km
Source
EMSC

West Sumatra · Basa Ampek Balai Tapan

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About this earthquake

On July 21, 2026 at 06:49 UTC, a magnitude M4.2 earthquake occurred near Basa Ampek Balai Tapan, West Sumatra (Indonesia). The hypocenter lay relatively close to the surface at around 9 km, increasing how strongly it was felt. Earthquakes of this magnitude are clearly felt; minor damage to vulnerable buildings is possible.

The event was recorded by EMSC. Indonesia: over the past 24 hours, QuakeMap24 logged 42 earthquakes, the strongest at M5.0.

Depth profile

Depth profile Depth: 9 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 9 km
Shallow
9 km
9 km — shallower than the regional average (43.4 km)
Regional average: 43.4 km
Why depth matters

Shallow quakes release energy near the surface — shaking is felt more strongly and damage potential is higher.

Depth classes per USGS

Volcanoes nearby

  • Kerinci
    Distance: 86 km ·Stratovolcano ·Elevation: 3'800 m ·Last eruption: 2024 ·Indonesia
  • Talang
    Distance: 126 km ·Stratovolcano ·Elevation: 2'575 m ·Last eruption: 2007 ·Indonesia
  • Sumbing
    Distance: 129 km ·Stratovolcano ·Elevation: 2'507 m ·Last eruption: 1921 ·Indonesia
  • Tandikat-Singgalang
    Distance: 189 km ·Stratovolcano(es) ·Elevation: 2'879 m ·Last eruption: 1924 ·Indonesia
  • Marapi
    Distance: 193 km ·Complex ·Elevation: 2'885 m ·Last eruption: 2026 ·Indonesia
  • Talakmau
    Distance: 253 km ·Complex ·Elevation: 2'911 m ·Indonesia

West Sumatra

Context for this earthquake

26 Sep 2025 – 26 Sep 2026 · M ≥ 3.0 · 40 Catalogue entries

Of 39 other entries for this area and period, 9 have a higher stored magnitude. Different magnitude types and reports not yet merged limit the comparison.

Open seismic profile

Historic earthquake map · Indonesia

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Explore recent and long-term earthquake activity in this country. Use filters to narrow down by magnitude, depth, and date range.

Country statistics · Indonesia

Country overview
View earthquake KPIs, strongest and latest events, and averages for this country.

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