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Mount Isarog

Isarog

Stratovolcano · Philippines · 1966m

Mount Isarog is seen in the background to the NW beyond the lower flanks of Iriga volcano in the foreground. It occupies the broad isthmus between Lagonoy Gulf and San Miguel Bay. The summit contains a large crater with a deep and narrow notch on the lower eastern flank.
Mount Isarog is seen in the background to the NW beyond the lower flanks of Iriga volcano in the foreground. It occupies the broad isthmus between Lagonoy Gulf and San Miguel Bay. The summit contains a large crater with a deep and narrow notch on the lower eastern flank. · Photo: Photo by Chris Newhall (U.S. Geological Survey). · Wikimedia Commons
Type
Stratovolcano
Country
Philippines
Region
Western Pacific / Eastern Philippine Volcanic Arc
Elevation
1966m
Coordinates
13.658, 123.380
Last eruption
-3500
Tectonic setting
Subduction zone / Continental crust (> 25 km)
Landform
Composite
Major rock type
Andesite / Basaltic Andesite
Geological summary

The broad isthmus between Lagonoy Gulf and San Miguel Bay in SE Luzon is occupied by Mount Isarog. The andesitic stratovolcano is truncated by a 2.5-km-wide crater that is breached to the east along a narrow valley drained by the Quinarag River. A major debris avalanche deposit extends NW to the coast and into San Miguel Bay. Pyroclastic flows originating from lava dome collapses have occurred during the Holocene, one of which has a calibrated radiocarbon date of about 5,500 years BP. The Maalsom vent displays gas seepages, warm springs, and steaming vents.

Eruption history

Summary (VEI over time)
Click a bar to see individual eruptions
3500 BCE~3500 BCE · 1 eruptions · max VEI ?3500 BCE3500 BCE3499 BCE3499 BCE3499 BCE

Detailed timeline

  1. 3500 BCE (±125 yrs)VEI ?Geological estimate
    BCE 3500 – Ongoing

External links

⚠ For reference only. Not for emergency response.