GAPHAZ - Glacier and Permafrost Hazards in Mountains
@gaphaz.bsky.social
A Scientific Standing Group of the International Association of Cryospheric Sciences (IACS) and the International Permafrost Association (IPA). Here for networking, collaboration, exchange.
Find us at gaphaz.org!
Find us at gaphaz.org!
Pinned
Welcome to gaphaz! Follow us here for all things glacial and periglacial hazards. If this topic interests you, become a gaphaz member by signing up to our mailing list: send an email with the text "subscribe GAPHAZ-members" in the body (no other text or signatures etc.) to listserv@lists.ubc.ca
Have you submitted your #EGU26 abstract?! We‘ve put together a little list (non-exhaustive) of sessions that fit gaphaz topics well. See you in #Vienna
#hazards #glaciers #permafrost #mountains #risk #science
#hazards #glaciers #permafrost #mountains #risk #science
The deadline for abstract submission for #EGU26 (3-8 May, Vienna) is Thursday, 15 January 2026 at 13:00 CET. @gaphaz.bsky.social inivtes you to submit abstracts to GAPHAZ related sessions, e.g. www.egu26.eu/session/56844 www.egu26.eu/session/56644
January 12, 2026 at 9:54 PM
Have you submitted your #EGU26 abstract?! We‘ve put together a little list (non-exhaustive) of sessions that fit gaphaz topics well. See you in #Vienna
#hazards #glaciers #permafrost #mountains #risk #science
#hazards #glaciers #permafrost #mountains #risk #science
Reposted by GAPHAZ - Glacier and Permafrost Hazards in Mountains
Climate change leads mountain guides in the Alps to alter their choice and timing of high-altitude routes, reacting to increasing danger 🧪 gh.copernicus.org/articles/80/...
Mapping climate-change-related processes affecting most frequented routes by French mountain guides
Abstract. This paper examines the impact of climate change on alpinism in the western European Alps, focusing particularly on the routes most frequently used by French mountain guides. The aim is to i...
gh.copernicus.org
December 17, 2025 at 9:21 PM
Climate change leads mountain guides in the Alps to alter their choice and timing of high-altitude routes, reacting to increasing danger 🧪 gh.copernicus.org/articles/80/...
Reposted by GAPHAZ - Glacier and Permafrost Hazards in Mountains
A number of #gaphaz members, including glaciologists from #Tajikistan, are investigating a sequence of catastrophic #detachments from #Didal glacier following sudden, #surge like accelerations this summer and fall. Stay tuned for more!
#hazard #risk #glacier #sciene #mountains
#hazard #risk #glacier #sciene #mountains
November 17, 2025 at 12:58 PM
A number of #gaphaz members, including glaciologists from #Tajikistan, are investigating a sequence of catastrophic #detachments from #Didal glacier following sudden, #surge like accelerations this summer and fall. Stay tuned for more!
#hazard #risk #glacier #sciene #mountains
#hazard #risk #glacier #sciene #mountains
Reposted by GAPHAZ - Glacier and Permafrost Hazards in Mountains
As #COP30 heats up, superb visual storytelling in @nytimes.com about climate change & the threat of glacial lake outburst floods in the Himalaya, featuring the work of @cscottwatson.bsky.social and quotes from @kristencook.bsky.social @sonamshp.bsky.social and me. 🧪⚒️ www.nytimes.com/interactive/...
Melting Glaciers in the Himalayas Feed Lakes That Threaten Towns Below (Gift Article)
Melting ice from the Himalayas is creating thousands of unstable lakes, a growing menace to towns and cities below.
www.nytimes.com
November 14, 2025 at 2:53 PM
As #COP30 heats up, superb visual storytelling in @nytimes.com about climate change & the threat of glacial lake outburst floods in the Himalaya, featuring the work of @cscottwatson.bsky.social and quotes from @kristencook.bsky.social @sonamshp.bsky.social and me. 🧪⚒️ www.nytimes.com/interactive/...
Reposted by GAPHAZ - Glacier and Permafrost Hazards in Mountains
📘 New paper: Post-Little Ice Age Shrinkage of the Tsaneri–Nageba Glacier System and Recent Proglacial Lake Evolution in the Georgian Caucasus
📉Glacier shrank ~43% since ~1820
🌊Lake grew from ~14,000m² in 2015 to ~107,900 m² 2025
⚠️Hazard + water resources implications
www.mdpi.com/2073-4441/17...
📉Glacier shrank ~43% since ~1820
🌊Lake grew from ~14,000m² in 2015 to ~107,900 m² 2025
⚠️Hazard + water resources implications
www.mdpi.com/2073-4441/17...
November 17, 2025 at 11:34 AM
📘 New paper: Post-Little Ice Age Shrinkage of the Tsaneri–Nageba Glacier System and Recent Proglacial Lake Evolution in the Georgian Caucasus
📉Glacier shrank ~43% since ~1820
🌊Lake grew from ~14,000m² in 2015 to ~107,900 m² 2025
⚠️Hazard + water resources implications
www.mdpi.com/2073-4441/17...
📉Glacier shrank ~43% since ~1820
🌊Lake grew from ~14,000m² in 2015 to ~107,900 m² 2025
⚠️Hazard + water resources implications
www.mdpi.com/2073-4441/17...
Reposted by GAPHAZ - Glacier and Permafrost Hazards in Mountains
Some good news from space, as the NASA-ISRO NISAR mission publishes its first synthetic aperture radar images of Earth. This spacecraft has a heckin' big antenna (a dish 12 meters across) for bouncing L- and S-band (25- and 10-cm) radio waves off the surface www.jpl.nasa.gov/news/nasa-is...
NASA-ISRO Satellite Sends First Radar Images of Earth’s Surface
Preliminary images from the most powerful Earth radar satellite ever launched offer a tantalizing glimpse of the science the mission will be able to deliver.
www.jpl.nasa.gov
September 25, 2025 at 5:51 PM
Some good news from space, as the NASA-ISRO NISAR mission publishes its first synthetic aperture radar images of Earth. This spacecraft has a heckin' big antenna (a dish 12 meters across) for bouncing L- and S-band (25- and 10-cm) radio waves off the surface www.jpl.nasa.gov/news/nasa-is...
Reposted by GAPHAZ - Glacier and Permafrost Hazards in Mountains
The Matai’an landslide dam in eastern Taiwan has failed this afternoon (eos.org/thelandslide...), flooding Guangfu, about 15 km downstream focustaiwan.tw/society/2025.... Even in the middle of a typhoon, the resulting flood produced a detectable seismic signal at stations ~40 km away.
September 23, 2025 at 5:21 PM
The Matai’an landslide dam in eastern Taiwan has failed this afternoon (eos.org/thelandslide...), flooding Guangfu, about 15 km downstream focustaiwan.tw/society/2025.... Even in the middle of a typhoon, the resulting flood produced a detectable seismic signal at stations ~40 km away.
Reposted by GAPHAZ - Glacier and Permafrost Hazards in Mountains
Die Unwetter 2024 forderten in der Schweiz 13 Todesopfer, 3 Vermisste und verursachten Schäden von 905 Mio. CHF. Es handelt sich um die fünfthöchste Jahresschadenssumme seit Beginn der Erhebungen 1972. www.wsl.ch/de/news/unwe... @bafu.admin.ch #Schweiz #WSL #Naturgefahren #Forschung
Unwetter 2024: viele Todesopfer und hohe Kosten
Dreizehn Todesfälle und 905 Mio. Franken Schäden: Das ist die Bilanz der Unwetter 2024, wie die jährliche Auswertung durch die WSL ergab.
www.wsl.ch
September 24, 2025 at 7:57 AM
Die Unwetter 2024 forderten in der Schweiz 13 Todesopfer, 3 Vermisste und verursachten Schäden von 905 Mio. CHF. Es handelt sich um die fünfthöchste Jahresschadenssumme seit Beginn der Erhebungen 1972. www.wsl.ch/de/news/unwe... @bafu.admin.ch #Schweiz #WSL #Naturgefahren #Forschung
We are at #IMC2025 in Innsbruck this week! Be sure not to miss our official #gaphaz session:
FS 3.148 - Glacier and permafrost risks in a changing climate (Wed. 13:30).
Convened by @jane-walden.bsky.social, #Marta-Chiarle and #Mylène-Jacquemart
FS 3.148 - Glacier and permafrost risks in a changing climate (Wed. 13:30).
Convened by @jane-walden.bsky.social, #Marta-Chiarle and #Mylène-Jacquemart
September 14, 2025 at 8:02 PM
We are at #IMC2025 in Innsbruck this week! Be sure not to miss our official #gaphaz session:
FS 3.148 - Glacier and permafrost risks in a changing climate (Wed. 13:30).
Convened by @jane-walden.bsky.social, #Marta-Chiarle and #Mylène-Jacquemart
FS 3.148 - Glacier and permafrost risks in a changing climate (Wed. 13:30).
Convened by @jane-walden.bsky.social, #Marta-Chiarle and #Mylène-Jacquemart
#GAPHAZ members are well represented at #IMC2025 in #Innsbruck 🏔️ this week and there are several sessions directly related to #glacial and #periglacial #hazards! We will kick things off tomorrow afternoon with a session on #Alpine #Mass #Movements. In SOWI - HS 3!
imc2025.info/imc25/sessio...
imc2025.info/imc25/sessio...
#IMC25 - FS 3.109: The Changing Face of Mountain Regions: Climate Change Impacts on Alpine Mass Movements
imc2025.info
September 14, 2025 at 7:03 PM
#GAPHAZ members are well represented at #IMC2025 in #Innsbruck 🏔️ this week and there are several sessions directly related to #glacial and #periglacial #hazards! We will kick things off tomorrow afternoon with a session on #Alpine #Mass #Movements. In SOWI - HS 3!
imc2025.info/imc25/sessio...
imc2025.info/imc25/sessio...
Excellent compilation of information about the Tracy Arm #landslide and #tsunami in #Alaska ! Check out the information put together by @akearthquake.bsky.social! earthquake.alaska.edu/event/025a7d...
#glacier #warning #hazards #risk #science
#glacier #warning #hazards #risk #science
Detail | Alaska Earthquake Center
earthquake.alaska.edu
September 14, 2025 at 6:52 PM
Excellent compilation of information about the Tracy Arm #landslide and #tsunami in #Alaska ! Check out the information put together by @akearthquake.bsky.social! earthquake.alaska.edu/event/025a7d...
#glacier #warning #hazards #risk #science
#glacier #warning #hazards #risk #science
Reposted by GAPHAZ - Glacier and Permafrost Hazards in Mountains
🚨 Important paper in Nature: "Systematic attribution of heatwaves to the emissions of carbon majors".
www.nature.com/articles/s41...
www.nature.com/articles/s41...
Systematic attribution of heatwaves to the emissions of carbon majors - Nature
Climate change made 213 historical heatwaves reported over 2000–2023 more likely and more intense, to which each of the 180 carbon majors (fossil fuel and cement producers) substantially contributed.
www.nature.com
September 10, 2025 at 5:41 PM
🚨 Important paper in Nature: "Systematic attribution of heatwaves to the emissions of carbon majors".
www.nature.com/articles/s41...
www.nature.com/articles/s41...
Exciting new NSF-funded initiative to advance knowledge about natural hazards! We look forward to learning more and seeing exciting science coming out of this!
September 4, 2025 at 5:47 PM
Exciting new NSF-funded initiative to advance knowledge about natural hazards! We look forward to learning more and seeing exciting science coming out of this!
Reposted by GAPHAZ - Glacier and Permafrost Hazards in Mountains
Today marks 60th anniversary of the Mattmark catastrophe, one of the deadliest glacier-related disaster in the Alps and largest catastrophe in Swiss modern history! 🧊🌊
30th Aug 1965: 2 Mm3 of Allalin Gl. broke off on Mattmark dam construction site, killing 88, many of whom were Italian immigrants 😭
30th Aug 1965: 2 Mm3 of Allalin Gl. broke off on Mattmark dam construction site, killing 88, many of whom were Italian immigrants 😭
August 30, 2025 at 10:32 AM
Today marks 60th anniversary of the Mattmark catastrophe, one of the deadliest glacier-related disaster in the Alps and largest catastrophe in Swiss modern history! 🧊🌊
30th Aug 1965: 2 Mm3 of Allalin Gl. broke off on Mattmark dam construction site, killing 88, many of whom were Italian immigrants 😭
30th Aug 1965: 2 Mm3 of Allalin Gl. broke off on Mattmark dam construction site, killing 88, many of whom were Italian immigrants 😭
Very nice overview of the recent #GLOF in Pakistan by @sgascoin.bsky.social!
There is so much going on these days, it’s great that various people in the community manage to find time to document these events! Fingers crossed that nobody was harmed. www.cesbio.cnrs.fr/multitemp/ra...
There is so much going on these days, it’s great that various people in the community manage to find time to document these events! Fingers crossed that nobody was harmed. www.cesbio.cnrs.fr/multitemp/ra...
Rapid analysis of the GLOF in Gupis, Gilgit-Baltistan – Séries Temporelles
The
www.cesbio.cnrs.fr
August 25, 2025 at 3:01 PM
Very nice overview of the recent #GLOF in Pakistan by @sgascoin.bsky.social!
There is so much going on these days, it’s great that various people in the community manage to find time to document these events! Fingers crossed that nobody was harmed. www.cesbio.cnrs.fr/multitemp/ra...
There is so much going on these days, it’s great that various people in the community manage to find time to document these events! Fingers crossed that nobody was harmed. www.cesbio.cnrs.fr/multitemp/ra...
Reposted by GAPHAZ - Glacier and Permafrost Hazards in Mountains
My rapid analysis of the recent GLOF (?) in Gupis, Gilgit-Baltistan www.cesbio.cnrs.fr/multitemp/ra...
August 24, 2025 at 1:23 AM
My rapid analysis of the recent GLOF (?) in Gupis, Gilgit-Baltistan www.cesbio.cnrs.fr/multitemp/ra...
Just when we thought NISAR would always „launch in two years“ it is finally here! Among other, it will provide valuable data on ground displacement to better understand and forecast landslides, also in high-mountain regions! Congrats to all involved!!
#nasa #stem #risk #hazards #landslide #data
#nasa #stem #risk #hazards #landslide #data
Final deployment of the NASA-ISRO SAR (NISAR) satellite, the 12-meter radar antenna reflector was successfully completed August 15. Congratulations to all people involved in this important milestone of the mission, in USA and India. #NASA #ISRO #SAR #satellite #NISAR www.jpl.nasa.gov/news/giant-r...
Giant Radar Antenna Reflector on NASA-ISRO Satellite in Full ‘Bloom’
Seventeen days after NISAR’s launch from southeastern India, an essential piece of science hardware has unfurled in orbit.
www.jpl.nasa.gov
August 16, 2025 at 10:26 AM
Nice one @geophysichick.bsky.social! How far in advance did you register these?
This is really an extraordinary event: landslide, glacial failure, tsunami. But to me, the most exciting part is the sequence of tiny earthquakes that occurred before the slide.
1/n
1/n
It has been a busy couple of days! There was a large landslide and tsunami in SE Alaska, in Tracy Arm, Sunday morning. Luckily, no injuries or casualties were reported. This region is outside of our current landslide coverage, but we were able to get a quick location after hearing about the event. 🧵
August 14, 2025 at 4:57 AM
Nice one @geophysichick.bsky.social! How far in advance did you register these?
Reposted by GAPHAZ - Glacier and Permafrost Hazards in Mountains
Juneau officials say new flood-control barriers are holding, making for far less damage than during last year’s destructive glacial outburst from Suicide Basin.
Mendenhall River at record high as Juneau residents brace for crest of glacial flooding
Officials say new barriers are holding, making for far less damage than during last year’s destructive glacial outburst from Suicide Basin.
www.adn.com
August 13, 2025 at 3:34 PM
Juneau officials say new flood-control barriers are holding, making for far less damage than during last year’s destructive glacial outburst from Suicide Basin.
Reposted by GAPHAZ - Glacier and Permafrost Hazards in Mountains
There are a tremendous number of icebergs in Tracy Arm following the landslide-triggered tsunami. The reason for this is that ~300 meters of the north side of South Sawyer Glacier broke off and disintegrated into many many smaller icebergs as seen in @planet.com imagery 🧪⚒️
August 13, 2025 at 2:47 PM
There are a tremendous number of icebergs in Tracy Arm following the landslide-triggered tsunami. The reason for this is that ~300 meters of the north side of South Sawyer Glacier broke off and disintegrated into many many smaller icebergs as seen in @planet.com imagery 🧪⚒️
Reposted by GAPHAZ - Glacier and Permafrost Hazards in Mountains
It is likely that a large, tsunamigenic landslide occurred in Tracy Arm inlet, in Alaska on 10 August 2025 at 5:30 am.
Seismic trace from the Alaska Earthquake Center, Satellite image (dated 7 August 2025 - before the landslide) from @planet.com.
eos.org/thelandslide...
Seismic trace from the Alaska Earthquake Center, Satellite image (dated 7 August 2025 - before the landslide) from @planet.com.
eos.org/thelandslide...
August 11, 2025 at 6:07 AM
It is likely that a large, tsunamigenic landslide occurred in Tracy Arm inlet, in Alaska on 10 August 2025 at 5:30 am.
Seismic trace from the Alaska Earthquake Center, Satellite image (dated 7 August 2025 - before the landslide) from @planet.com.
eos.org/thelandslide...
Seismic trace from the Alaska Earthquake Center, Satellite image (dated 7 August 2025 - before the landslide) from @planet.com.
eos.org/thelandslide...
Reposted by GAPHAZ - Glacier and Permafrost Hazards in Mountains
First cloud-free optical satellite imagery from @planet.com show the destruction of Dharali village in Uttarkashi, Uttarakhand, India. Unfortunately the source area in the mountains is still obscured by cloud and so the ultimate cause is still speculative. 🧪⚒️
August 7, 2025 at 3:27 PM
First cloud-free optical satellite imagery from @planet.com show the destruction of Dharali village in Uttarkashi, Uttarakhand, India. Unfortunately the source area in the mountains is still obscured by cloud and so the ultimate cause is still speculative. 🧪⚒️
Dramatic images reaching us from Dharali village in Uttarakhand in the last hours. The consequences of this debris flow look horrendous, and our thoughts are with the local community and emergency response. More details will surely emerge soon.
#cloudburst #hazard #debrisflow #remergency #risk
#cloudburst #hazard #debrisflow #remergency #risk
This is what looks a village hit by several millions m3 debris flow... 😱🌊
View over remains of the Dharali village from the left bank of the Khera Gad river, when Army arrived on site
Via @manaman_chhina
View over remains of the Dharali village from the left bank of the Khera Gad river, when Army arrived on site
Via @manaman_chhina
August 6, 2025 at 11:35 AM
Dramatic images reaching us from Dharali village in Uttarakhand in the last hours. The consequences of this debris flow look horrendous, and our thoughts are with the local community and emergency response. More details will surely emerge soon.
#cloudburst #hazard #debrisflow #remergency #risk
#cloudburst #hazard #debrisflow #remergency #risk
🚨 #IMC2025 Update! 🚨
The abstract submission for the special session on the Nesthorn-Birchgletscher #hazard cascade is now open (and will be open until August 22). Details on 💻 submission and (late) registration can be found here:
imc2025.info/imc25/specia...
#Innsbruck #Blatten #STEM #risk #science
The abstract submission for the special session on the Nesthorn-Birchgletscher #hazard cascade is now open (and will be open until August 22). Details on 💻 submission and (late) registration can be found here:
imc2025.info/imc25/specia...
#Innsbruck #Blatten #STEM #risk #science
#IMC25 - The avalanche disaster in Blatten
imc2025.info
July 24, 2025 at 3:07 PM
🚨 #IMC2025 Update! 🚨
The abstract submission for the special session on the Nesthorn-Birchgletscher #hazard cascade is now open (and will be open until August 22). Details on 💻 submission and (late) registration can be found here:
imc2025.info/imc25/specia...
#Innsbruck #Blatten #STEM #risk #science
The abstract submission for the special session on the Nesthorn-Birchgletscher #hazard cascade is now open (and will be open until August 22). Details on 💻 submission and (late) registration can be found here:
imc2025.info/imc25/specia...
#Innsbruck #Blatten #STEM #risk #science