Shaul Hurwitz

Shaul Hurwitz

Yellowstone National Park loses the granddaddy of American volcano scientists

By: , and - October 3, 2022

USGS geologist and the founding Scientist-in-Charge of the Yellowstone Volcano Observatory Robert “Bob” Christiansen died on Sept. 15, 2022, in Palo Alto, California. Bob, or “Chris,” as his colleagues and friends often called him, leaves a legacy of scientific achievement, articulate writing, and a warm and humble personality that endeared him to all. He received […]

Water released from magma can trigger earthquakes in Yellowstone National Park

By: and - September 26, 2022

Pressure variations associated with water flowing through the crust (the outermost layer of the Earth) can trigger earthquakes. This is because pressurized fluids inside a fault zone can partially counter the force pressing the two blocks of rock on both sides of a fault together, making it easier for those blocks to slip along the fault. […]

That’s so hot: Some of Yellowstone’s geyser and boiling water is hotter than others

By: - July 13, 2022

Boiling refers to the process of converting a liquid into gas (a phase change). The temperature at which water boils depends on the surrounding pressure and on the amount of gas and salts in the water. As pressure increases, so does the boiling temperature. At sea level, where air pressure is one atmosphere, pure water (with no […]

When in Earth’s history did Yellowstone National Park begin?

By: - January 25, 2022

What were the major events have shaped the Earth and its environment, and when did these events takes place? When did the major volcanic events in Yellowstone take place within the sequence of Earth’s major events? Geologic research has made significant progress to answer these questions, and future discoveries will further refine the fascinating story. […]

The long journey of water from Yellowstone geysers to the ocean

By: - July 6, 2021

Yellowstone’s hot spring waters ultimately flow for thousands of miles before entering the ocean. But waters enter two different oceans—the Gulf of Mexico and the Pacific Ocean. There are numerous hot springs and a lot water flowing in Yellowstone, but what is the fate of the hot water erupted from Old Faithful Geyser, for example? Where does that water […]