Results 91 to 100 of about 46,249 (173)

2023 activity of Nyamulagira volcano monitored by SAR interferometric coherence

open access: yesScience of Remote Sensing
In this work the multi-temporal InSAR coherence is exploited to analyze several phenomena during the 2023 Nyamulagira volcano activity in the Democratic Republic of Congo.
Marco Polcari   +4 more
doaj   +1 more source

Science Writers' Guide to Landsat 7 [PDF]

open access: yes, 1999
This guide was produced for science writers and the media and profiles several Landsat 7 research projects, and provides background and contact information.

core  

Long Unrest (2007–2025) at Laguna del Maule: Linking Strain Field and Seismicity From GNSS and Seismic Data

open access: yesGeophysical Research Letters, Volume 53, Issue 4, 28 February 2026.
Abstract The Laguna del Maule volcanic field in Chile has been uplifting at exceptional rates since 2007, offering a unique opportunity to examine the interplay between crustal deformation and magma dynamics. To understand this relationship, we integrate GNSS with local seismic observations from 2013 to 2024 to model the reservoir strain field ...
M. Navarrete‐Reyes   +6 more
wiley   +1 more source

Secular variation and excursions of the Earth magnetic field during the Plio-Quaternary: New paleomagnetic data from radiometrically dated lava flows of the Colima volcanic complex (western Mexico)

open access: yesRevista Mexicana de Ciencias Geológicas, 2018
Detailed rockmagnetic and paleomagnetic investigations were performed on selected lava flows from the Colima volcanic complex (CVC) located in the western sector of the Trans-Mexican Volcanic Belt. Reliable paleomagnetic directions were obtained from 21
Rafael García-Ruiz   +7 more
doaj   +1 more source

Vigorous Motions in Magma Chambers and Lava Lakes [PDF]

open access: yes, 1992
Magma chambers and lava lakes are storage reservoirs of molten rock, which gradually cools and solidifies after emplacement. The molten rock is a multicomponent silicate melt that crystallizes to form a solid whose components differ locally from those of the original melt.
Herbert E. Huppert, M. Grae Worster
openaire   +1 more source

Charles Darwin y las glaciaciones más antiguas de Patagonia: los bloques erráticos del alto valle del Río Santa Cruz [PDF]

open access: yes, 2009
Although the depositational environment assigned by Darwin to the large erratic blocks and gravels in the Río Santa Cruz valley has been reinterpreted, his geomorphological and stratigraphic observations are still in force.
Malagnino, Eduardo Cayetano   +1 more
core  

Satellite Geodesy Captures Offset Magma Supply Associated With Lava Lake Appearance at Masaya Volcano, Nicaragua

open access: yesGeophysical Research Letters, 2018
Ascending and descending Interferometric Synthetic Aperture Radar data sets from various satellites (CSK, RSAT‐2, ALOS‐2, and Sentinel‐1) show a maximum of ∼8 cm ground inflation in Masaya caldera over a 10 month period (6 November 2015 to 1 September ...
K. J. Stephens, C. Wauthier
doaj   +1 more source

Tephra From the 3 March 2015 Sustained Column Related to Explosive Lava Fountain Activity at Volcán Villarrica (Chile)

open access: yesFrontiers in Earth Science, 2018
Exceptionally intense lava fountains at open conduit volcanoes are infrequent, hazardous and little-warned events. Studying their tephra falls may reveal conduit dynamics, eruption source parameters and fragmentation mechanisms.
Jorge E. Romero   +12 more
doaj   +1 more source

"Hades" - A remarkable cave on Oldoinyo Lengai in the East African Rift Valley [PDF]

open access: yesInternational Journal of Speleology, 1998
Oldoinyo Lengai is the world’s only active carbonatite volcano, situated in northern Tanzania within the Eastern Rift Valley, al 2.751 degrees S, 35.902 degrees E.
Gordon J. Davies
doaj  

Volcanic features of Hawaii. A basis for comparison with Mars [PDF]

open access: yes
Despite the difference in size Martian and Hawaiian volcanoes have numerous characteristics in common. Specific features such as lava channels, collapsed lava tubes, levees and flow fronts, all very common in Hawaii, are also abundant on the flanks of ...
Carr, M. H., Greeley, R.
core   +1 more source

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