When did the Long Valley Caldera last erupt?

When did the Long Valley Caldera last erupt?

760,000 years ago
Hot Creek near the Long Valley supervolcano. The Long Valley Caldera is the depression formed from the supervolcano eruption 760,000 years ago, which ejected hot ash, lava and toxic gas. The eruption 760,000 years ago erupted 140 cubic miles of material from the supervolcano.

How often does Long Valley Caldera erupt?

During the last 5,000 years, an eruption has broken out somewhere along this chain every 250 to 700 years.

When did caldera erupt?

about 2.1 million years ago
The first caldera-forming eruption occurred about 2.1 million years ago. The eruptive blast removed so much magma from its subsurface storage reservoir that the ground above it collapsed into the magma chamber and left a gigantic depression in the ground- a hole larger than the state of Rhode Island.

When did mono Inyo Craters last eruption?

about 600 years ago
The last eruption at the Mono Craters took place about 600 years ago, nearly contemporaneously with the eruptions from Inyo Craters to the south. It formed tephra rings and obsidian lava domes, lava flows and locally extensive ash and pumice layers.

When did Mammoth erupt?

about 50,000 years ago
The latest magmatic eruptions at Mammoth Mountain took place about 50,000 years ago.

When was Yellowstone caldera?

The Yellowstone caldera was discovered by Bob Christiansen from the US Geological Survey via geological field work in the 1960s and 1970s. The smoldering Yellowstone super volcano is an underground heat engine that fuels the steaming geysers, bubbling mud puddles and hot springs.

Can caldera still erupt?

Unlike Mount Mazama, the Deception volcano is still active. The Deception volcano experienced a violent eruption roughly 10,000 years ago that caused its summit to collapse and flood with seawater, forming a caldera about 7 kilometers (4.4 miles) wide.

Will Long Valley caldera erupt again?

The pattern of volcanic activity over the past 5,000 years suggests that the next eruption in the Long Valley area will most likely happen somewhere along the Mono-Inyo volcanic chain. However, the probability of such an eruption occurring in any given year is less than 1%.

Is Mammoth lake a volcano?

Mammoth Mountain is technically not an active volcano because it hasn’t erupted in the last 10,000 years. The last time Mammoth Mountain erupted was approximately 57,000 years ago.

When and where was the most recent activity of the mono-Inyo craters?

In the past 6,000 years, approximately 0.19 cubic miles (0.8 km3) of magma has been erupted from the Inyo part of the chain. The last recorded volcanic activity in the chain was at Mono Lake between the years 1720 and 1850. An intrusion of magma below the lake pushed lakebed sediments upward to form Paoha Island.

What type of volcano is Long Valley Caldera?

The Long Valley volcano is unusual in that it has produced eruptions of both basaltic and silicic lava in the same geological place. Water from the Owens River filled the caldera to a depth of 300 metres (984 ft) as of 600,000 years ago. At that time, the lake surface was at an elevation near 7,500 feet (2,286 m).

What type of eruption does Yellowstone Caldera produce?

Yellowstone Volcano Observatory. The most likely type of volcanic eruption at Yellowstone would produce lava flows of either rhyolite or basalt; rhyolitic lava eruptions could also include explosive phases that might produce significant volumes of volcanic ash and pumice.

When was the last volcano eruption in California?

California last experienced a volcanic eruption on May 22, 1915, when Mount Lassen sent pulverizing streams of volcanic debris down its slopes.

When did Long Valley Caldera erupt?

The Long Valley caldera was produced by a catastrophic eruption about 730,000 years ago. The roof above the magma chamber collapsed, forcing 150 cubic miles (600 cubic km) of rhyolitic magma to the surface in the form of Plinian ash columns and associated air falls and ash flows.