Harry Glicken was a volcanologist

Volcanologist

A volcanologist is a person who studies the formation of volcanoes, and their current and historic eruptions. Volcanologists frequently visit volcanoes, especially active ones, to observe volcanic eruptions, collect eruptive products including tephra , rock and lava samples...

 who was killed on 3 June 1991 by a pyroclastic flow

Pyroclastic flow

A pyroclastic flow is a fast-moving current of superheated gas and rock , which reaches speeds moving away from a volcano of up to 700 km/h . The flows normally hug the ground and travel downhill, or spread laterally under gravity...

 on Mount Unzen

Mount Unzen

is an active volcanic group of several overlapping stratovolcanoes, near the city of Shimabara, Nagasaki Prefecture, on the island of Kyūshū, Japan’s southernmost main island....

 in Japan

Japan

Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...

. Also killed were forty-two other scientist

Scientist

A scientist in a broad sense is one engaging in a systematic activity to acquire knowledge. In a more restricted sense, a scientist is an individual who uses the scientific method. The person may be an expert in one or more areas of science. This article focuses on the more restricted use of the word...

s and journalist

Journalist

A journalist collects and distributes news and other information. A journalist's work is referred to as journalism.A reporter is a type of journalist who researchs, writes, and reports on information to be presented in mass media, including print media , electronic media , and digital media A...

s, including volcanologists Katia and Maurice Krafft

Katia and Maurice Krafft

Katia Krafft and her husband, Maurice Krafft were French volcanologists who died in a pyroclastic flow on Mount Unzen, in Japan, on June 3, 1991. The Kraffts were known for being pioneers in filming, photographing and recording volcanoes, often getting within feet of lava flows...

.

Glicken was scheduled to observe Mount St. Helens on 18 May 1980, the day of its eruption; however, he was not present on that day as he had an interview at a college in California

California

California is a state located on the West Coast of the United States. It is by far the most populous U.S. state, and the third-largest by land area...

. His replacement, David A. Johnston

David A. Johnston

David Alexander Johnston was an American volcanologist with the United States Geological Survey who was killed by the 1980 eruption of Mount St. Helens in Washington. One of the principal scientists on the monitoring team, Johnston died while manning an observation post about 6 miles from the...

, was killed by the eruption of Mount St. Helens

1980 eruption of Mount St. Helens

The 1980 eruption of Mount St. Helens, a stratovolcano located in Washington state, in the United States, was a major volcanic eruption. The eruption was the only significant one to occur in the contiguous 48 U.S. states since the 1915 eruption of Lassen Peak in California...

.

Publications

• Geology and ground-water hydrology of Spirit Lake blockage, Mount St. Helens, Washington, with implications for lake retention (1989) U.S. Geological Survey Bulletin 1789
• Rockslide-debris avalanche of May 18, 1980, Mount St. Helens Volcano, Washington (1996) U.S. Geological Survey Open File 96-677
• The effects of ground water, slope stability, and seismic hazards on the stability of the South Fork Castle Creek blockage in the Mount St. Helens area, Washington (1985) U.S. Geological Survey Professional Paper 1345
• The effects of ground water, slope stability, and seismic hazard on the stability of the South Fork Castle Creek blockage in the Mount St. Helens area, Washington (1984) U.S. Geological Survey Open File 84-624

External links

• Glicken at vulcan.wr.usgs.gov
• Yoshiaki Ida and Barry Voight, Introduction to the Harry Glicken memorial special issue on "models of magmatic processes and volcanic eruptions", Journal of Volcanology and Geothermal Research Volume 66, Issues 1-4, Models of Magmatic Processes and Volcanic Eruptions, July 1995, Pages ix-xvi.