A space to discuss aspects of the Caribbean geology, ore potential of the ophiolite belts, etc.
Thursday, October 9, 2025
https://youtu.be/K5tGl-nLGcQ
#valls_geoconsultant #VolcanicHazards #Geology #Seismicity
VOLCANO WARNING: Naples, Rainier, Jakarta face explosive risks.
Cities near volcanoes face increasing volcanic hazards, making global city exposure critical for disaster preparedness. This video delivers an urgent volcano warning, covering the latest volcano risk ranking data on major Holocene volcanoes threatening metropolises like Jakarta, Bandung Indonesia, Naples volcano (Campi Flegrei, Vesuvius), and Mount Rainier lahar hazards. We explore how institutions like the USGS GVP quantify global city exposure to volcanic hazards using population distance thresholds (10 km, 30 km, 100 km).
Our analysis highlights cities scoring highly on the composite volcano risk ranking, such as Bandung, which is exposed to up to 12 nearby volcanoes, and San Salvador, exposed to the highest number of volcanoes globally (n=23). We detail the specific threats from pyroclastic flow and volcanic ash fallout, which severely impacts highly exposed populations in South-East Asia. For structural geologists and tectonics specialists, we examine complex precursory unrest signals. This includes the notable ground deformation and accelerated seismicity associated with bradyseism at Campi Flegrei near Naples.
We also discuss the contrasting pattern observed before the 2021 Fagradalsfjall eruption in Iceland, where a critical eruption warning sign was actually a decline in deformation and seismicity following the culmination of dyke intrusion emplacement—a phenomenon suggesting that tectonic stress release must be considered when forecasting eruptions. We review current unrest globally, including recent KÄ«lauea eruption updates and the ongoing inflation and earthquake swarm at Mount Spurr Alaska. Understanding these diverse volcano monitoring challenges is essential for effective disaster preparedness in high-threat zones.
The bridge between Academy and Industry!
P. Geo. Ricardo A Valls, M. Sc. and Geo Gadfly
Valls Geoconsultant
ORCID ID- https://orcid.org/0000-0002-5421-0914
Scopus Author ID: 7003369619/35335510700
ResearcherID: S-6604-2018
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