COMMENT: Marty, Here in Alaska, we have been put on alert that Mt Spurr may erupt soon. Your computer has been remarkable projecting these trend of rising volcanic activity here in 2025 and we are still in the first quarter. Do you have any historical analysis of Mt. Spurr?
Rob
REPLY: Mount Spurr, a stratovolcano in Alaska’s Aleutian Arc, had no confirmed historical eruptions that have been documented in human records prior to its significant 1953 eruption. However, geological studies reveal prehistoric activity:
- Holocene Eruptions:
- The most recent major eruptive period occurred approximately 8,000–9,000 years ago, involving pyroclastic flows and lava dome formation that shaped the current structure of the volcano. These eruptions were identified through tephrochronology and radiocarbon dating of volcanic deposits.
- Late Pleistocene Activity:
- Evidence suggests earlier…
