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https://youtu.be/prpz3vN4du0 Geophysicist Brian Shiro of the USGS-Hawaiian Volcano Observatory joins us to discuss earthquakes on the most active Hawaiian volcanoes during 2019. Topics include: - Status and historical context of Mauna Loa's seismicity before prior eruptions (and non-eruptions) - Deep earthquakes and tremor under Pāhala - Continued motion under Kīlauea's south flank - Mechanics of big earthquakes and theoretical limits - Earthquake preparedness and what to do during the shaking - The Great Hawai‘i ShakeOut event in October, including a PSA by The Rock Mahalo nui (many thanks) to the USGS-Hawaiian Volcano Observatory for the interview, and to the Kua O Ka Lā Public Charter School for use of their facilities, despite their ongoing challenges since the 2018 eruption which destroyed their campus. The USGS-Hawaiian Volcano Observatory offers a wealth of information on their website: https://volcanoes.usgs.gov/observatories/hvo/ Hawaiian earthquakes basics from USGS-HVO: https://volcanoes.usgs.gov/observatories/hvo/about_earthquakes.html Earthquakes in Hawai‘i: What You Need To Know, presentation by USGS-HVO updated September 2019: https://volcanoes.usgs.gov/vsc/file_mngr/file-164/PPT_EQ%20in%20Hawaii_2015-2019.pdf To report a felt earthquake through "Did You Feel It?": https://earthquake.usgs.gov/data/dyfi/ For more information on the Great Hawai‘i ShakeOut: https://www.shakeout.org/hawaii/ For USGS-HVO's live earthquake map, showing the last month's seismicity: https://volcanoes.usgs.gov/observatories/hvo/hvo_earthquakes.html And finally, for more information on the Kua O Ka Lā Public Charter School: https://www.kuaokala.org REFERENCES Thelen, W. A., A. Miklius, and C. Neal (2017), Volcanic unrest at Mauna Loa, Earth’s largest active volcano, Eos, 98, Published on 16 October 2017. https://doi.org/10.1029/2017EO083937. [ 2016-2019 seismicity & GPS data approximated from data accessed in October 2019 with control points compiled from USGS Earthquake Catalog. ] https://volcanoes.usgs.gov/volcanoes/mauna_loa/monitoring_data4.html USGS-HVO Volcano Watch, October 10, 2019: "Why do so many deep earthquakes happen around Pāhala?" https://volcanoes.usgs.gov/observatories/hvo/hvo_volcano_watch.html?vwid=1433 Wech, A.G. and W. A. Thelen (2015), Linking magma transport structures at Kīlauea volcano, Geophysical Research Letters, 42:17, Published on 31 July 2015. https://doi.org/10.1002/2015GL064869 Neal, C. A. et al. (2019), The 2018 rift eruption and summit collapse of Kīlauea volcano, Science, 363:6425, Published on 25 January 2019. https://doi.org/10.1126/science.aav7046 Denlinger, R. P. and J. K. Morgan (2014), Instability of Hawaiian Volcanoes, Chapter 4 within: Poland, M.P., Takahashi, T.J., and Landowski, C.M., eds., 2014, Characteristics of Hawaiian volcanoes: U.S. Geological Survey Professional Paper 1801, 429 p. http://dx.doi.org/10.3133/pp1801 USGS-HVO Volcano Watch, October 11, 2018: "Aftershocks of the 2018 magnitude 6.9 earthquake expected to continue" https://volcanoes.usgs.gov/observatories/hvo/hvo_volcano_watch.html?vwid=1386 Mahalo nui!

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