Results 71 to 80 of about 78,518 (194)

Hazards of volcanic lakes: analysis of Lakes Quilotoa and Cuicocha, Ecuador [PDF]

Advances in Geosciences, 2008
Volcanic lakes within calderas should be viewed as high-risk systems, and an intensive lake monitoring must be carried out to evaluate the hazard of potential limnic or phreatic-magmatic eruptions. In Ecuador, two caldera lakes – Lakes Quilotoa
G. Gunkel, C. Beulker, B. Grupe, F. Viteri   +3 more
doaj  

Integrating GNSS and Hydrological Data to Understand Seasonal Microseismicity at La Soufrière de Guadeloupe

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 3, March 2026.
Abstract La Soufrière de Guadeloupe volcano exhibits microseismic activity dominated by volcano‐tectonic repeaters, mainly occurring in swarms clustered in a sub‐vertical conduit beneath the Tarissan acid lake (TAS) at depths less than 800 m. Following the April 2018 earthquake (Mlv 4.1), which likely damaged the dome, swarms intensified and show ...
Laëtitia Pantobe, Kristel Chanard, Arnaud Burtin, Pierre Sakic, Jean‐Christophe Komorowski   +4 more
wiley   +1 more source

The impact of the 1783–1784 AD Laki eruption on global aerosol formation processes and cloud condensation nuclei [PDF]

, 2010
The 1783–1784 AD Laki flood lava eruption commenced on 8 June 1783 and released 122 Tg of sulphur dioxide gas over the course of 8 months into the upper troposphere and lower stratosphere above Iceland. Previous studies have examined the impact of the
Carslaw, K. S., Schmidt, A., A. Schmidt, G. W. Mann, K. S. Carslaw, Wilson, M., M. Wilson, T. J. Breider, Mann, G. W., T. Thordarson, Breider, T. J., S. J. Pickering, Thordarson, T., Pickering, S. J.   +13 more
core   +2 more sources

Chemistry, Growth, and Fate of the Unique, Short‐Lived (2019–2020) Water Lake at the Summit of Kīlauea Volcano, Hawaii

Geochemistry, Geophysics, Geosystems
Less than a year after the 2018 Kīlauea caldera collapse and eruption, water appeared in newly deepened Halemaʻumaʻu crater. The lake—unprecedented in the written record—grew to a depth of ∼50 m before lava from the December 2020 eruption boiled it away.
P. A. Nadeau, S. Hurwitz, S. Peek, A. H. Lerner, E. F. Younger, M. R. Patrick, D. E. Damby, R. B. McCleskey, P. J. Kelly   +8 more
doaj   +1 more source

Modeling the Impact of Initiation Parameters on the Dynamics of the 2012 Te Maari Laterally Confined Debris Avalanche

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 3, March 2026.
Abstract Volcanic debris avalanches can transform into highly mobile debris flows, reaching long runout distances and posing significant hazards to downstream populations. This high mobility arises from complex, evolving rheological behavior driven by dynamic changes in pore pressure, internal resistance, and material properties during the flow.
Juliette Vicente, Stuart Mead
wiley   +1 more source

Stratigraphy of Carbonate‐Bearing Rocks at the Margin of Jezero Crater, Mars: Evidence for Shoreline Processes?

Journal of Geophysical Research: Planets, Volume 131, Issue 1, January 2026.
Abstract Martian carbonate‐bearing rocks are compelling targets for exploration because they preserve detailed records of past aqueous processes, climate, and habitability. The Margin unit in Jezero crater is a distinct olivine‐ and carbonate‐bearing unit stratigraphically underlying the western fan, lining the inner margin of the western crater rim ...
Alexander J. Jones, Sanjeev Gupta, Robert Barnes, Briony H. N. Horgan, Kenneth H. Williford, Gerhard Paar, Kathryn. M. Stack, Bradley J. Garzcynski, Eleni Ravanis, Candice C. Bedford, Justin I. Simon, Athanasios Klidaras, Linda C. Kah, James F. Bell, Justin Maki, Stephen W. Lokier, Adrian Brown, Nathan R. Williams, Sanna Alwmark, Jorge I. Núñez, Fred Calef, Larry Crumpler, Alicia Vaughan, Libby R. W. Ives, Sam Gwizd, Ken Farley, Christian Tate, Nicolas Randazzo, Olivier Beyssac, Gwénaël Caravaca   +29 more
wiley   +1 more source

MOESM1 of Phreatic eruptions and deformation of Ioto Island (Iwo-jima), Japan, triggered by deep magma injection

, 2018
Additional file 1: Figure S1. The daily number of earthquakes and vertical movement at Motoyama before and following phreatic eruptions after 1976 were not accompanied by precursors. The eruption list is shown in Table 1.
Toshikazu Tanada (4949887), Hideki Ueda (3412469), Masashi Nagai (4949884)   +2 more
core   +1 more source

Anatomy of active volcanic edifice at the Kusatsu–Shirane volcano, Japan, by magnetotellurics: hydrothermal implications for volcanic unrests

Earth, Planets and Space, 2020
We aimed to perform three-dimensional imaging of the underlying geothermal system to a depth of 2 km using magnetotellurics (MT) at around the Yugama crater, the Kusatsu–Shirane Volcano, Japan, which is known to have frequent phreatic eruptions.
Kuo Hsuan Tseng, Yasuo Ogawa, Nurhasan, Sabri Bülent Tank, Naoto Ujihara, Yoshimori Honkura, Akihiko Terada, Yoshiya Usui, Wataru Kanda   +8 more
doaj   +1 more source

Petrological Constraints on Trachytic Magma Beneath Ioto, Ogasawara, Japan: Implications for Ongoing Post‐Caldera Volcanism

Island Arc, Volume 35, Issue 1, January/December 2026.
ABSTRACT Active volcanism commonly occurs in post‐caldera systems, many of which are characterized by crustal uplift associated with resurgent domes. Although geophysical studies have revealed diverse styles of post‐caldera deformation, petrological constraints on magma storage conditions during ongoing post‐caldera volcanism remain limited.
Takahiro Miwa, Masashi Nagai, Tomofumi Kozono, Setsuya Nakada, Atsushi Yasuda, Taku Ozawa, Hideki Ueda, Toshikazu Tanada, Eisuke Fujita   +8 more
wiley   +1 more source

Changes in seismic anisotropy at Ontake volcano: a tale of two eruptions

Seismica
The interaction of faults, fractures, and hydromagmatic systems of volcanoes can lead to complicated stress patterns that vary over short spatial and temporal scales.
Michael Kendall, Toshiko Terakawa, Martha Savage, Tom Kettlety, Daniel Minifie, Haruhisa Nakamichi, Andreas Wuestefeld   +6 more
doaj   +1 more source