Nikolas KozloffJan 16
Beware #lahars
https://www.nytimes.com/2026/01/16/science/mount-rainier-lahar-mudflow.html?utm_source=firefox-newtab-en-us My take here
https://nkozphoto.com/index.php/2025/09/24/volcanoes-climate-change-and-darwins-legacy-in-chile/ #rainier #lahar #volcano #volcanoes #science #darwin #evolution #chile
If the Volcanic Eruption Doesn’t Scare You, the Mudflow Should

Studying tree rings helped scientists pinpoint when Mount Rainier last sent a lahar down its steep slopes, which could help planners anticipate future mudflows.

The New York Times
GentleMan GefNov 26

Living near the Pacific Ocean and previously amongst the Pacific Rim volcanoes in Washington State and Oregon, I have learned to be aware of tsunami or lahar threats and evacuation routes.

I was just thinking that while visiting Salem OR there is an earthquake risk, but no walls of water or boulder strewn hot mud are expected.

#CampingWithJeff # #tsunami #lahar

Ryan HiteJul 21, 2025
🌋 Mount Rainier isn’t just a mountain.
It’s an active volcano sitting on a ticking mud bomb.
A future lahar could erase towns like Orting & Puyallup in under an hour.
Read how the next U.S. mega-disaster might begin:
🔗 https://www.ryanjhite.com/2025/07/20/mount-rainier-the-majestic-time-bomb-that-could-destroy-everything/
#MountRainier #Volcano #Lahar #PNW
Mount Rainier’s Hidden Threat: The Lahar Disaster Waiting to Happen

Mount Rainier isn’t just a mountain—it’s a volcano capable of unleashing deadly mudflows that could erase entire towns in under an hour. Here’s what to know.

Ryan J. Hite
El MundoMar 31, 2025

CNE declara alerta naranja para Parque Nacional Volcán Poás y Toro Amarillo

CNE declara alerta naranja para Parque Nacional Volcán Poás y Toro Amarillo
Alajuela, 31 mar (elmundo.cr) – La Comisión Nacional de Prevención de Riesgos y Atención de Emergencias (CNE) [...]

#ActividadVolcánica #AlertaNaranja #AlertaVerde #CNE #Ceniza #CostaRica #ErupciónVolcánica #Gases #Lahar #OVSICORI #ParqueNacionalVolcánPoás #RSN #Sarchí #Sismología #ToroAmarillo #VolcánPoás #Vulcanología

https://elmundo.cr/costa-rica/cne-declara-alerta-naranja-para-parque-nacional-volcan-poas-y-toro-amarillo/

CNE declara alerta naranja para Parque Nacional Volcán Poás y Toro Amarillo

CNE declara alerta naranja para Parque Nacional Volcán Poás y Toro Amarillo Costa Rica - El Mundo CR

El Mundo CR
💧🌏 Greg CocksFeb 22, 2025
Grfin Tools—User Guide And Methods For Modeling Landslide Runout And Debris-Flow Growth And Inundation
--
https://pubs.usgs.gov/publication/tm14A3 <-- shared USGS publication
--
https://code.usgs.gov/grfintools/grfintools <-- shared USGS software release
--
H/T Jonathan Perkins USGS
[ another open source resource for everyone from the USGS ~smile~ ]
#GIS #spatial #mapping #opensource #openlibrary #Grfin #software #package #regional #debrisflow #engineeringgeology #geology #inundation #spatialanalysis #spatiotemporal #geophysics #geophysical #massmovement #landslide #lahar #volcano #rock #avalanche #model #modeling #statistical #geostatistics #water #hydrology #downstream #elevation #remotesensing #DEM #flow #runout #risk #hazard #tools #slope #erosion #drainage #network #channel #channelisation #userguide
@USGS
Grfin Tools—User guide and methods for modeling landslide runout and debris-flow growth and inundation

The software package, Grfin Tools, can estimate potential runout from landslides or inundation from geophysical mass flows such as debris flows, lahars from volcanoes, and rock avalanches within a digital elevation model (DEM). Grfin is an acronym of growth + flow + inundation. The tools within this package apply simple, well-tested, empirical models of runout that are computationally efficient and require minimal parameters. These tools can be used individually (for example, to estimate debris-flow inundation) or in combination to represent a more complete series of linked processes, from landslide source areas, to unchannelized transport, to channelized flows. Grfin Tools can rapidly assess potential runout and inundation over large areas and the results are readily visualized in a geographic information system.Tools for assessing areas affected by runout and flow inundation include a height-to-length (H/L) ratio, angle-of-reach approach for estimating open-slope, unchannelized landslide runout, and volume-area scaling relations for assessing flow inundation...

Norobiik @[email protected]Jun 28, 2024

#Kanlaon has been under Alert Level 2 since June 3, following a “moderately explosive eruption” that forced residents living near the #volcano to evacuate, caused #ashfall, triggered #lahar and even killed thousands of farm animals.

An average of 10 volcanic #earthquakes per day has been recorded since the eruption, while Kanlaon’s edifice has been inflated or swollen since March 2022.

#KanlaonVolcano #SulfurDioxide reaches record high on June 28
https://www.rappler.com/philippines/visayas/phivolcs-kanlaon-volcano-update-advisory-june-28-2024-615pm/

Kanlaon Volcano sulfur dioxide reaches record high on June 28

'This is the highest emission from the volcano recorded since instrumental gas monitoring began,' says Phivolcs

RAPPLER
Bayan Mo, iPatrol MoJun 6, 2024

Inabot ng #lahar o #mudflow mula sa pumutok na #BulkangKanlaon ang Bgy. Biak na Bato, La Castellana, #NegrosOccidental kahapon, Hunyo 5.

Basahin ang kaugnay na ulat: https://news.abs-cbn.com/news/2024/6/5/torrent-of-volcanic-mudflow-hits-philippine-village-1726

livusMay 13, 2024

Dozens killed in cold lava mudslides on Indonesian island of Sumatra

Heavy rains triggered flash floods and caused torrents of cold lava and mud to flow down a volcano’s slopes on Indonesia’s Sumatra island, killing at least 41 people and leaving more than a dozen others missing, officials have said. Monsoon rains and a major mudslide from a cold lava flow on Mount Marapi caused a river to... #sumatra #indonesia #asiapacific #southeastasia #asia #lahar #lava #volcano #civilemergency #worldnews #worldwithoutus

https://www.theguardian.com/world/article/2024/may/13/indonesia-mudslides-sumatra-cold-lava-floods-death-toll-mount-merapi

Dozens killed in cold lava mudslides on Indonesian island of Sumatra

Nearly 20 missing after monsoon rains trigger flash floods, sending torrents of volcanic material and mud down slopes of Mount Marapi volcano

The Guardian
Lukas VFN 🇪🇺Jan 13, 2024

A 22-million-year-old petrified #mangrove forest found in the Panama Canal https://phys.org/news/2024-01-million-year-petrified-mangrove-forest.html

An early #Miocene (#Aquitanian) mangrove #fossil forest buried by a #volcanic lahar at #BarroColoradoIsland, #Panama https://www.sciencedirect.com/science/article/abs/pii/S0031018223006247

"approximately 1 million years after the formation of #BarroColorado Island, a #volcano erupted, followed by a #lahar, which covered the island with mud and rocks. It also covered the #MangroveForest that had grown around the edges of the island."

A 22-million-year-old petrified mangrove forest found in the Panama Canal

A team of environmental and natural scientists from Universidad EAFIT in Colombia, the Smithsonian Tropical Research Institute in Panama, and Boise State University in the U.S. has found evidence of an ancient petrified mangrove forest on an island in the Panama Canal. For their study, reported in the journal Palaeogeography, Palaeoclimatology, Palaeoecology, the group collected fossils and sediment samples from the island.

Phys.org
Smitha 🌸🌋🎻Sep 14, 2023

When they said, “#PugetSound is built on #Rainier’s mudflows,” I didn’t realize they meant that there was no land where Tacoma, Kent, Auburn, and Renton currently are before the colossal #OsceolaMudflow filled in those parts of Puget Sound 5600 years ago.

#seattle #geology #lahar #MtRainier #Takoma #volcano