Article
Geosciences, Multidisciplinary
Yasuo Miyabuchi, Eiichi Sato
Summary: This study examines the dispersal and grain size characteristics of the deposits from the May 14, 2018 eruption of Shinmoedake volcano in southwestern Japan. The analysis combines field and meteorological data to understand the eruption sequence and the behavior of the plume. The study finds that the wind direction and altitude influenced the dispersal and grain size of the deposits, with different characteristics observed on the east and west sides of the main dispersal axis.
EARTH PLANETS AND SPACE
(2023)
Article
Multidisciplinary Sciences
Jens Karstens, Jonas Preine, Gareth J. Crutchley, Steffen Kutterolf, Willem G. M. van der Bilt, Emilie E. E. Hooft, Timothy H. Druitt, Florian Schmid, Jan Magne Cederstrom, Christian Huebscher, Paraskevi Nomikou, Steven Carey, Michel Kuehn, Judith Elger, Christian Berndt
Summary: In this study, seismic reflection and P-wave tomography datasets were integrated with computed tomography-derived sedimentological analyses to estimate the volume of the iconic Minoan eruption. The results revealed a total eruption volume of 34.5 +/- 6.8 km(3), with different proportions of tephra fall deposits, ignimbrites, intra-caldera deposits, and lithics. These volume estimates were consistent with an independent caldera collapse reconstruction. The findings demonstrate the importance of complementary geophysical and sedimentological datasets for reliable eruption volume estimates and volcanic hazard assessments.
NATURE COMMUNICATIONS
(2023)
Article
Geochemistry & Geophysics
Azusa Mori, Hiroyuki Kumagai, John Makario Londono
Summary: Seismic source amplitudes can be used to predict both eruption plume height and eruption duration. This study provides insights into the relationship between source amplitudes and eruption characteristics, and has important implications for real-time predictions and estimation of ashfall distributions.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2022)
Article
Geosciences, Multidisciplinary
Dan Muramatsu, Takeshi Matsushima, Mie Ichihara
Summary: The study identified infrasonic signals from multiple vents of the Iwo-yama volcano in Japan, successfully revealing signals from two main eruption craters and reconstructing the eruption sequence. Intense eruptions occurred several hours after the eruption onset at each crater, as depicted by evident infrasound signals. This sequence of activities in a phreatic eruption provides valuable insights for understanding such eruptions and conducting hazard assessments.
EARTH PLANETS AND SPACE
(2021)
Article
Geosciences, Multidisciplinary
Genji Saito, Teruki Oikawa, Osamu Ishizuka
Summary: The eruption activity of Shinmoedake in the Kirishima volcanic group of Japan resumed in 2017-18 after a period of quiescence. Petrological studies and melt inclusion analyses were conducted to understand the cause of the different eruption styles. Comparison of the volcanic gases and melt inclusions revealed that the 2018 magma had lower volatile content compared to the 2011 magma, resulting in effusive eruptions instead of explosive eruptions.
EARTH PLANETS AND SPACE
(2023)
Article
Geosciences, Multidisciplinary
Yohei Yukutake, Ahyi Kim, Takao Ohminato
Summary: This study uses machine learning methods to monitor volcanic earthquake activity, obtaining detailed information of volcanic earthquakes at the Kirishima volcano over the past 12 years through waveform correlation analysis. The study successfully increased the detection quantity and resolution of volcanic earthquakes, and detected earthquake activities that indicate the possibility of volcanic eruptions.
EARTH PLANETS AND SPACE
(2023)
Article
Multidisciplinary Sciences
D. C. Roman, A. Soldati, D. B. Dingwell, B. F. Houghton, B. R. Shiro
Summary: The viscosity of magma strongly influences the style and hazard potential of a volcanic eruption. The unexpected 2018 eruption of Kilauea Volcano in Hawai'i demonstrated significant variability in erupted lavas, leading to unpredictable effusion rates and explosivity. Seismic and magma rheology analysis revealed a 90-degree local stress-field rotation prior to the eruption, indicating the involvement of magma with heightened viscosity.
Article
Environmental Sciences
Melliza Templonuevo Cruz, James Bernard Simpas, Robert Holz, Chung-Shin Yuan, Gerry Bagtasa
Summary: In this study, the chemical and physical characteristics of two air pollution events in Metro Manila, Philippines in January 2020 were analyzed. During the New Year's eve fireworks, the concentration of PM2.5 and certain metallic components used in fireworks increased significantly. The Taal volcano eruption caused visible tephra deposits and a slight increase in PM2.5 concentration. The study also demonstrated the capability of the WRF-Chem model for future ashfall forecasting.
Article
Geochemistry & Geophysics
Olivier Lengline, Zacharie Duputel, P. G. Okubo
Summary: This study used seismic records to infer the migration of the dike in the lower East Rift Zone of the Kilauea volcano, finding that the migration is consistent with a logarithmic model connected to a feeding magma chamber. The results suggest that the dynamics of magma transfer can be monitored in real time through the combination of seismic data and physical models.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Geosciences, Multidisciplinary
D. Skye Kushner, Taryn M. M. Lopez, Kristi L. L. Wallace, David E. E. Damby, Christoph Kern, Cheryl E. E. Cameron
Summary: This study analyzes the mercury concentrations in 227 bulk ash samples from the Mount Spurr (1992), Redoubt Volcano (2009), and Augustine Volcano (2006) eruptions. The results show that there is no significant difference in mercury concentrations based on distance or discrete eruptive events, but there is a significant difference among different volcanic sources. It is also found that previous approaches to estimate volcanic total mercury emissions underestimate the mercury emitted in explosive events.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Geochemistry & Geophysics
Gabrielle Tepp
Summary: The Failure Forecast Method (FFM) was tested for its applicability to caldera collapses, showing changes in seismic and ground deformation parameters during the events, but ultimately failed to predict the collapse events or the end of the eruption.
EARTH AND PLANETARY SCIENCE LETTERS
(2021)
Article
Multidisciplinary Sciences
Mie Ichihara, Takao Ohminato, Kostas I. Konstantinou, Kazuya Yamakawa, Atsushi Watanabe, Minoru Takeo
Summary: The accelerating growth of seismic unrest before eruptions has been observed at many volcanoes and utilized for eruption forecasts. However, there are still many eruptions for which no precursory unrest has been identified, even at well-monitored volcanoes. Here we present seismological evidence that the eruption preparation had been ongoing at the shallow depths beneath Shinmoe-dake for several months to a year.
SCIENTIFIC REPORTS
(2023)
Article
Geosciences, Multidisciplinary
Paul Segall, Kyle Anderson, Taiyi A. Wang
Summary: In 2018, Kilauea volcano erupted causing caldera collapse after a decade of basalt eruption. However, less than 2.5 years later, Kilauea erupted again. Analysis of magma surges and Global Positioning System data suggests that the pressure condition required to bring magma to the surface was met at the onset of the 2020 eruption.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Angel Amores, Sebastian Monserrat, Marta Marcos, Daniel Argueso, Joan Villalonga, Gabriel Jorda, Damia Gomis
Summary: On 15 January 2022, the eruption of the Hunga-Tonga volcano in the South Pacific Ocean resulted in a violent underwater explosion, causing tsunami waves and atmospheric pressure disturbances. Numerical simulation shows an excellent agreement between the simulated wave arrival time and observations.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Mauro Rosi, Valerio Acocella, Raffaello Cioni, Francesca Bianco, Antonio Costa, Prospero De Martino, Guido Giordano, Salvatore Inguaggiato
Summary: A crucial aspect of managing a volcanic crisis is the ability of volcanologists to quickly detect an impending eruption. This study focuses on identifying different states of active volcanoes using monitoring data and highlights the importance of recognizing the state of impending eruption for timely forecasts. Applying this rationale to active volcanoes in densely populated areas demonstrates its feasibility and significance in eruption forecasting.
FRONTIERS IN EARTH SCIENCE
(2022)