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Left right left episode 542/25/2023 ![]() ![]() Near-vent lava samples document a significant range in composition, temperature and crystallinity of pre-eruptive magma. Combined geophysical and petrologic data for the 1994–1999 eruptive interval, including episode 54, reveal a variety of shallow magmatic conditions that persist in association with prolonged rift zone eruption. A 23-h-long eruption (episode 54) ensued from fissures that were overlapping or en echelon with eruptive fissures formed during episode 1 in 1983 and those of earlier rift zone eruptions in 19. ![]() On January 29–30, 1997, prolonged steady-state effusion of lava from Pu'u'O'o was briefly disrupted by shallow extension beneath Napau Crater, 1–4 km uprift of the active Kilauea vent. ![]()
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