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April 21, 2026

P.I.E.F.E.S.T. – what’s that?? It stands for Pacific Islanders Encouraging Fun, Engineering, Science, and Technology, and the 5th Annual P.I.E.F.E.S.T. in San Mateo, CA was where California Volcano Observatory Scientists spent their Saturday on April 11.

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This photograph shows a model volcano sitting on a table surrounded by people. The model volcano has a plume of fine material suspended in the air above it, indicating it erupted immediately before the photo was taken. In front of the table, children participants face away from the camera looking at the volcano and the plume. Behind the table, animated scientists in brightly colored shirts are smiling and looking up at the plume.
An eruption of the tabletop "Mount Shasta" using cornstarch as volcanic ash and puffed rice cereal as "lava bombs". USGS photo by M. Glasgow.

Together with a trusty erupting model of Mount Shasta, a box full of lava bombs, and the finest silver volcanologist suit, we shared knowledge through hands-on learning about volcanic hazards, rocks, and eruptions. Our audience included families from the many Pacific Islander groups represented in California, including folks with heritage from Hawai’i, Fiji, Tonga, Samoa, New Zealand, Tahiti, and elsewhere. More than 350,000 Pacific Islanders live in California, more than any state other than Hawai’i, and 1 in 5 live in the Bay Area. 

Many Pacific Islands are volcanic, giving us the opportunity to talk about Hawaiian and American Samoan volcanoes as well as the ones we have right here in California! Participants also enthusiastically helped scientists make the volcano “erupt” with rice cereal and corn flour many times. Afterward, they had the opportunity to inspect real volcanic rocks, match up volcanic hazards with their eruption settings, and even take photos in our lava sampling suit.

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This photo shows a science festival booth surrounded by children and their families. A model volcano sits on a blue tarp behind a "Mt Shasta Rocks!" sign. Behind the table, a scientist in an orange USGS cap explains volcanic rocks, while another scientist in a volcano-themed Hawaiian shirt prepares the model volcano for its next "eruption".
CalVO scientists explaining the differences between lava types to several future volcanologists while "Mount Shasta" prepares for its next eruption. USGS photo by J. Ball

Outreach events like this are a chance for scientists to interact directly with the communities we serve, both to help share our knowledge about volcanoes and to help people prepare for the next volcanic eruption in California. Because eruptions are a low-probability, high-impact event, we want people to be comfortable with the possibility of experiencing volcanic hazards while still appreciating the beautiful places they create – whether on the Mainland or across the ocean!

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