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Volcano Watch — So what on Earth (or at least on Kīlauea) is a “gas piston”?

Summary by Howzit Kohala
By Hawaiian Volcano Observatory July 3, 2025 If you’ve been following the ongoing eruption of Kīlauea, you may have seen the terms “gas piston” or “gas pistoning” show up in some of the USGS Hawaiian Volcano Observatory (HVO) updates, photo captions, and other places. Volcano Watch is a weekly article and activity update written by U.S. Geological Survey Hawaiian Volcano Observatory scientists and affiliates. Media Sources/Usage: Public Doma…
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Howzit Kohala broke the news in on Thursday, July 3, 2025.
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