Yellowstone Holds Normal Alert With 68 July Quakes as USGS Puts Super-Eruption Odds at 1 in 730,000
Updated
Updated · The Economic Times · Aug 13
Yellowstone Holds Normal Alert With 68 July Quakes as USGS Puts Super-Eruption Odds at 1 in 730,000
2 articles · Updated · The Economic Times · Aug 13
Summary
USGS says Yellowstone remains at Normal alert in August 2026, with background seismicity and ground deformation and no sign a catastrophic eruption is imminent.
Only a fraction of Yellowstone’s magma is molten, scientists say, leaving no evidence that enough eruptible magma has accumulated to support another super-eruption.
July monitoring logged 68 earthquakes, the largest at magnitude 3.3, while researchers say any future eruption is far more likely to be a smaller lava flow, explosive event or hydrothermal blast.
A full super-eruption—last seen 631,000 years ago—could eject more than 1,000 cubic kilometres of material, spread ash across much of the United States and temporarily cool the climate.
USGS estimates the annual chance of another Yellowstone super-eruption at roughly 1 in 730,000, underscoring that the volcano is active but not considered overdue.