Geophysical observations of Kilauea Volcano, Hawaii. II. Constraints on the magma supply during November 1975–September 1977

1980 ◽  
Vol 27 (12) ◽  
pp. 869
Geology ◽  
2020 ◽  
Author(s):  
Emily K. Montgomery-Brown ◽  
Asta Miklius

Forecasting heightened magmatic activity is key to assessing and mitigating global volcanic hazards, including eruptions from lateral rift zones at basaltic volcanoes. At Kīlauea volcano, Hawaiʻi (United States), planar dikes intrude its east rift zone (ERZ) and repeatedly affect the same segments. Here we show that Kīlauea’s upper and middle ERZ dikes in the last four decades intruded at regular intervals of ~8 or ~14 yr. Segments with shorter recurrence intervals are adjacent to faster-moving parts of the flank, and ~1–5 MPa of tension accumulates from flank spreading in the time between dike events. Intrusion frequency was neither advanced nor delayed during magma supply variations, supporting the role of long-term flank motion on the timing of dike intrusions. Although fewer historical dikes have occurred near the 2018 CE eruption site in the lower ERZ and the adjacent slowly sliding lower eastern flank, similar tension accumulated between the 1955 and 2018 eruptions. Regular dike intrusion recurrence intervals indicate the importance of including both extrusive and (commonly neglected) intrusive activity in eruption hazard analyses.


1980 ◽  
Vol 7 (3-4) ◽  
pp. 241-269 ◽  
Author(s):  
Daniel Dzurisin ◽  
Lennart A. Anderson ◽  
Gordon P. Eaton ◽  
Robert Y. Koyanagi ◽  
Peter W. Lipman ◽  
...  

1993 ◽  
Vol 98 (B12) ◽  
pp. 22255-22268 ◽  
Author(s):  
John J. Dvorak ◽  
Daniel Dzurisin

1984 ◽  
Vol 21 (3-4) ◽  
pp. 177-206 ◽  
Author(s):  
Daniel Dzurisin ◽  
Robert Y. Koyanagi ◽  
Thomas T. English

2012 ◽  
Vol 5 (4) ◽  
pp. 295-300 ◽  
Author(s):  
Michael P. Poland ◽  
Asta Miklius ◽  
A. Jeff Sutton ◽  
Carl R. Thornber

Science ◽  
2019 ◽  
Vol 366 (6470) ◽  
pp. eaay9070 ◽  
Author(s):  
M. R. Patrick ◽  
H. R. Dietterich ◽  
J. J. Lyons ◽  
A. K. Diefenbach ◽  
C. Parcheta ◽  
...  

Lava flows present a recurring threat to communities on active volcanoes, and volumetric eruption rate is one of the primary factors controlling flow behavior and hazard. The time scales and driving forces of eruption rate variability, however, remain poorly understood. In 2018, a highly destructive eruption occurred on the lower flank of Kīlauea Volcano, Hawai‘i, where the primary vent exhibited substantial cyclic eruption rates on both short (minutes) and long (tens of hours) time scales. We used multiparameter data to show that the short cycles were driven by shallow outgassing, whereas longer cycles were pressure-driven surges in magma supply triggered by summit caldera collapse events 40 kilometers upslope. The results provide a clear link between eruption rate fluctuations and their driving processes in the magmatic system.


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