Prof. Diego Melgar
@diegosismologo.bsky.social
Director of the Cascadia Region Earthquake Science Center (@cascadiaeqs.bsky.social) and Associate Professor of geophysics at University of Oregon. I research big earthquakes and tsunamis.
Reposted by Prof. Diego Melgar
CRESCENT's Twinning Program is seeking mentor pairs to guide undergraduate students through a yearlong research project.
⏰ Applications close January 15, 2026
Program begins Fall 2026
Learn more and apply here ⬇️
cascadiaquakes.org/2024/10/03/m...
⏰ Applications close January 15, 2026
Program begins Fall 2026
Learn more and apply here ⬇️
cascadiaquakes.org/2024/10/03/m...
November 5, 2025 at 5:47 PM
CRESCENT's Twinning Program is seeking mentor pairs to guide undergraduate students through a yearlong research project.
⏰ Applications close January 15, 2026
Program begins Fall 2026
Learn more and apply here ⬇️
cascadiaquakes.org/2024/10/03/m...
⏰ Applications close January 15, 2026
Program begins Fall 2026
Learn more and apply here ⬇️
cascadiaquakes.org/2024/10/03/m...
Reposted by Prof. Diego Melgar
A new study argues that in the past, Cascadia quakes have triggered the San Andreas to go off, and that it could happen again.
But other experts, while recognizing that may technically be possible, want more evidence.
Read more at NatGeo:
www.nationalgeographic.com/science/arti...
But other experts, while recognizing that may technically be possible, want more evidence.
Read more at NatGeo:
www.nationalgeographic.com/science/arti...
How ‘the big one’ near Seattle could trigger an earthquake in San Francisco
Are two of the deadliest earthquake zones in North America linked? It's possible—but controversial.
www.nationalgeographic.com
October 23, 2025 at 6:43 PM
A new study argues that in the past, Cascadia quakes have triggered the San Andreas to go off, and that it could happen again.
But other experts, while recognizing that may technically be possible, want more evidence.
Read more at NatGeo:
www.nationalgeographic.com/science/arti...
But other experts, while recognizing that may technically be possible, want more evidence.
Read more at NatGeo:
www.nationalgeographic.com/science/arti...
On July 29, 2025 a Mw 8.8 earthquake off Kamchatka launched a Pacific-wide tsunami, right as the SWOT satellite flew south-to-north taking altimetry measurements of the wave train. In our new preprint, we pair SWOT with nearby DART buoys to capture the tsunami’s propagation and its source
October 1, 2025 at 2:08 PM
On July 29, 2025 a Mw 8.8 earthquake off Kamchatka launched a Pacific-wide tsunami, right as the SWOT satellite flew south-to-north taking altimetry measurements of the wave train. In our new preprint, we pair SWOT with nearby DART buoys to capture the tsunami’s propagation and its source
Discussing tsunamis at @omsiedu.bsky.social last night was great fun. Definitely the biggest screen I've ever presented on!
August 29, 2025 at 1:29 AM
Discussing tsunamis at @omsiedu.bsky.social last night was great fun. Definitely the biggest screen I've ever presented on!
Reposted by Prof. Diego Melgar
We are entering a new era for tsunami observations and model validation-- The SWOT era! Thanks a lot @baptistegomb.bsky.social for reaching out, this was a fun collaboration. Also great working with @diegosismologo.bsky.social and @valah.bsky.social. @haskoliislands.bsky.social
Superb observation by the SWOT altimetry satellite of the July 30 #tsunami. Data acquired ~1h after the M8.8 Kamchatka earthquake show the waves propagating across the Pacific with a great agreement with @rocangel.bsky.social's model!
[more here](www.aviso.altimetry.fr/fr/missions/...)
#CNES #CLS
[more here](www.aviso.altimetry.fr/fr/missions/...)
#CNES #CLS
August 11, 2025 at 1:18 PM
We are entering a new era for tsunami observations and model validation-- The SWOT era! Thanks a lot @baptistegomb.bsky.social for reaching out, this was a fun collaboration. Also great working with @diegosismologo.bsky.social and @valah.bsky.social. @haskoliislands.bsky.social
A sprawling collaboration with colleagues in Myanmar, Thailand, Singapore, China, and the US. Yes, undoubtedly super-shear, and unique because a set of trenches had fortuitously been opened at the Sagaing fault where the event nucleated a few years before the 2025 earthquake
🌏A Supershear Earthquake Strikes Myanmar: Fast, Long, and Repeating
Melgar et al. reveal a fast 450 km rupture from March 28 M7.8 quake, ties to past Sagaing Fault quakes, highlighting seismic repeatability & the urgent need for resilience.
Read more: seismica.library.mcgill.ca/article/view...
Melgar et al. reveal a fast 450 km rupture from March 28 M7.8 quake, ties to past Sagaing Fault quakes, highlighting seismic repeatability & the urgent need for resilience.
Read more: seismica.library.mcgill.ca/article/view...
August 5, 2025 at 3:56 PM
A sprawling collaboration with colleagues in Myanmar, Thailand, Singapore, China, and the US. Yes, undoubtedly super-shear, and unique because a set of trenches had fortuitously been opened at the Sagaing fault where the event nucleated a few years before the 2025 earthquake
Video is almost certainly real. From colleagues in Russia:
August 5, 2025 at 1:49 PM
Video is almost certainly real. From colleagues in Russia:
This looks consistent with (official) reports of 10-20 m run-ups in Kamchatka/Okhotsk. With complex topo/bathy short wavelength features like the waves seen here can develop and superimpose on the long period tsunami. We've seen this in other places. Time will tell if this can be verified
NEW: Extraordinary footage has emerged of the huge tsunami that hit Russia’s remote Kamchatka peninsula after the 8.8 magnitude earthquake on July 30th.
(🎥 Doni Nikz)
(🎥 Doni Nikz)
August 4, 2025 at 4:53 PM
This looks consistent with (official) reports of 10-20 m run-ups in Kamchatka/Okhotsk. With complex topo/bathy short wavelength features like the waves seen here can develop and superimpose on the long period tsunami. We've seen this in other places. Time will tell if this can be verified
Reposted by Prof. Diego Melgar
Tsunami resulting from a M 8.7 Petropavlovsk-Kamchatsky, Russia. Preliminar solution from USGS and GeoClaw model. @haskoliislands.bsky.social
July 30, 2025 at 3:43 AM
Tsunami resulting from a M 8.7 Petropavlovsk-Kamchatsky, Russia. Preliminar solution from USGS and GeoClaw model. @haskoliislands.bsky.social
Reposted by Prof. Diego Melgar
Are you a geoscientist who works with offshore datasets? Register now for CRESCENT's Offshore Observations Topical Workshop!
This workshop will take place the day before our annual meeting, on October 27th.
Learn more and register here ⬇️
cascadiaquakes.org/2025/01/23/o...
This workshop will take place the day before our annual meeting, on October 27th.
Learn more and register here ⬇️
cascadiaquakes.org/2025/01/23/o...
July 17, 2025 at 7:36 PM
Are you a geoscientist who works with offshore datasets? Register now for CRESCENT's Offshore Observations Topical Workshop!
This workshop will take place the day before our annual meeting, on October 27th.
Learn more and register here ⬇️
cascadiaquakes.org/2025/01/23/o...
This workshop will take place the day before our annual meeting, on October 27th.
Learn more and register here ⬇️
cascadiaquakes.org/2025/01/23/o...
Reposted by Prof. Diego Melgar
Cores2Code is a wrap! Last week, students learned Python and crustal deformation models—then shared their final projects. We’re excited to see where their geoscience paths lead! Huge thanks to @diatomdura.bsky.social, Andrea Hawkes, Harvey Kelsey & @diegosismologo.bsky.social for making it happen!
July 2, 2025 at 12:08 AM
Cores2Code is a wrap! Last week, students learned Python and crustal deformation models—then shared their final projects. We’re excited to see where their geoscience paths lead! Huge thanks to @diatomdura.bsky.social, Andrea Hawkes, Harvey Kelsey & @diegosismologo.bsky.social for making it happen!
Reposted by Prof. Diego Melgar
Calling all artists interested in the geosciences! We are seeking original art emphasizing seismic hazard awareness and community engagement to feature on this year's CRESCENT Annual Meeting posters and t-shirts.
Learn more about the annual meeting and poster contest here:
➡️ lnkd.in/gXqFTUDD
Learn more about the annual meeting and poster contest here:
➡️ lnkd.in/gXqFTUDD
June 27, 2025 at 10:11 PM
Calling all artists interested in the geosciences! We are seeking original art emphasizing seismic hazard awareness and community engagement to feature on this year's CRESCENT Annual Meeting posters and t-shirts.
Learn more about the annual meeting and poster contest here:
➡️ lnkd.in/gXqFTUDD
Learn more about the annual meeting and poster contest here:
➡️ lnkd.in/gXqFTUDD
Reposted by Prof. Diego Melgar
Registration is now open for CRESCENT's Offshore Observations Topical Workshop October 27, the day before our Annual Meeting!
Learn more and register by July 11 ⬇️
cascadiaquakes.org/2025/01/23/o...
Learn more and register by July 11 ⬇️
cascadiaquakes.org/2025/01/23/o...
June 20, 2025 at 5:17 PM
Registration is now open for CRESCENT's Offshore Observations Topical Workshop October 27, the day before our Annual Meeting!
Learn more and register by July 11 ⬇️
cascadiaquakes.org/2025/01/23/o...
Learn more and register by July 11 ⬇️
cascadiaquakes.org/2025/01/23/o...
Reposted by Prof. Diego Melgar
Registration is now open for CRESCENT's Annual Meeting October 28-29!
Learn more and register by July 11 ⬇️
cascadiaquakes.org/2...
Learn more and register by July 11 ⬇️
cascadiaquakes.org/2...
June 11, 2025 at 7:18 PM
Registration is now open for CRESCENT's Annual Meeting October 28-29!
Learn more and register by July 11 ⬇️
cascadiaquakes.org/2...
Learn more and register by July 11 ⬇️
cascadiaquakes.org/2...
Reposted by Prof. Diego Melgar
CRESCENT's first Cores to Code program is off to a great start! The group started in Eugene and made their way down to Arcata, CA where they will be spending the next 3 weeks. They made geologic stops along the way to learn about the geology of Cascadia.
June 10, 2025 at 4:30 PM
CRESCENT's first Cores to Code program is off to a great start! The group started in Eugene and made their way down to Arcata, CA where they will be spending the next 3 weeks. They made geologic stops along the way to learn about the geology of Cascadia.
Reposted by Prof. Diego Melgar
This morning, we kicked off our first technical short course in Seattle, WA: Machine Learning.
Over the next three days participants will learn to develop AI-aided earthquake catalogs through three key steps: event detection, association, and location.
Over the next three days participants will learn to develop AI-aided earthquake catalogs through three key steps: event detection, association, and location.
May 12, 2025 at 4:44 PM
This morning, we kicked off our first technical short course in Seattle, WA: Machine Learning.
Over the next three days participants will learn to develop AI-aided earthquake catalogs through three key steps: event detection, association, and location.
Over the next three days participants will learn to develop AI-aided earthquake catalogs through three key steps: event detection, association, and location.
Super fun and collaborative work on land-level changes and their hazards in Cascadia. Check it out!
🚨New Study Alert!🚨
Our new PNAS study shows how earthquake-driven land subsidence + rising seas = major flood hazards along the Cascadia subduction zone. 🌊🌎 @cascadiaeqs.bsky.social (1/🧵)
www.pnas.org/doi/epdf/10....
Our new PNAS study shows how earthquake-driven land subsidence + rising seas = major flood hazards along the Cascadia subduction zone. 🌊🌎 @cascadiaeqs.bsky.social (1/🧵)
www.pnas.org/doi/epdf/10....
April 28, 2025 at 8:28 PM
Super fun and collaborative work on land-level changes and their hazards in Cascadia. Check it out!
Reposted by Prof. Diego Melgar
It is #TsunamiPreparednessWeek in British Columbia - a great time to learn more about the past and prepare for the future, starting with stories and lessons passed down from those who have lived on this coast for 1000’s of years 🧪⚒️🌊
hakaimagazine.com/features/gre...
Article from @hakai.org magazine
hakaimagazine.com/features/gre...
Article from @hakai.org magazine
The Great Quake and the Great Drowning | Hakai Magazine
Mega-quakes have periodically rocked North America’s Pacific Northwest. Indigenous people told terrifying stories about the devastation but refused to leave.
hakaimagazine.com
April 14, 2025 at 2:23 PM
It is #TsunamiPreparednessWeek in British Columbia - a great time to learn more about the past and prepare for the future, starting with stories and lessons passed down from those who have lived on this coast for 1000’s of years 🧪⚒️🌊
hakaimagazine.com/features/gre...
Article from @hakai.org magazine
hakaimagazine.com/features/gre...
Article from @hakai.org magazine
Reposted by Prof. Diego Melgar
Today is the anniversary of the Pacific Northwest's worst modern earthquake, the April 13th, 1949 mag 6.7 near Olympia. 8 people died, many were injured, and millions of $$ (in 1940's money) in damage. It was a "slab event" in the subducted plate at ~50 km depth.
April 13, 2025 at 9:29 PM
Today is the anniversary of the Pacific Northwest's worst modern earthquake, the April 13th, 1949 mag 6.7 near Olympia. 8 people died, many were injured, and millions of $$ (in 1940's money) in damage. It was a "slab event" in the subducted plate at ~50 km depth.
Reposted by Prof. Diego Melgar
The Makah CASE team is mentoring 9th-grade interns from Neah Bay High School on a project about Cascadia geohazards. Learn more and hear from one of the 9th-graders!
cascadiaquakes.org/2...
cascadiaquakes.org/2...
April 10, 2025 at 2:00 PM
The Makah CASE team is mentoring 9th-grade interns from Neah Bay High School on a project about Cascadia geohazards. Learn more and hear from one of the 9th-graders!
cascadiaquakes.org/2...
cascadiaquakes.org/2...
Reposted by Prof. Diego Melgar
We are hiring! This Specialist position within CRESCENT at the University of California, Davis is focused on creating cyberinfrastructure to support an interdisciplinary science program centered on data curation, management, and use.
Learn More and Apply: recruit.ucdavis.edu/JPF07007
Learn More and Apply: recruit.ucdavis.edu/JPF07007
April 4, 2025 at 10:54 PM
We are hiring! This Specialist position within CRESCENT at the University of California, Davis is focused on creating cyberinfrastructure to support an interdisciplinary science program centered on data curation, management, and use.
Learn More and Apply: recruit.ucdavis.edu/JPF07007
Learn More and Apply: recruit.ucdavis.edu/JPF07007
Or not, seismology is hard :)
April 3, 2025 at 8:56 PM
Or not, seismology is hard :)
Station NPW is ~250 km from the hypocenter. For that acceleration pulse to get to the site when it does rupture needs to be trucking along at ~5 km/s. Shear wave speeds at ~10km depth according to Litho1.0 are 3.46 km/s. The rupture is most likely, realy really, supreshear.
April 3, 2025 at 8:28 PM
Station NPW is ~250 km from the hypocenter. For that acceleration pulse to get to the site when it does rupture needs to be trucking along at ~5 km/s. Shear wave speeds at ~10km depth according to Litho1.0 are 3.46 km/s. The rupture is most likely, realy really, supreshear.
Reposted by Prof. Diego Melgar
GNSS is used to monitor Earth's crustal deformation, including slow-slip. This study compares traditional denoising approaches to advanced ML techniques to improve position accuracy.
Read now: seismica.library.mcgill.ca/article/view...
@cascadiaeqs.bsky.social, @diegosismologo.bsky.social
Read now: seismica.library.mcgill.ca/article/view...
@cascadiaeqs.bsky.social, @diegosismologo.bsky.social
March 25, 2025 at 3:43 PM
GNSS is used to monitor Earth's crustal deformation, including slow-slip. This study compares traditional denoising approaches to advanced ML techniques to improve position accuracy.
Read now: seismica.library.mcgill.ca/article/view...
@cascadiaeqs.bsky.social, @diegosismologo.bsky.social
Read now: seismica.library.mcgill.ca/article/view...
@cascadiaeqs.bsky.social, @diegosismologo.bsky.social
Reposted by Prof. Diego Melgar
Apply for @nagtgeo.bsky.social Early Career Geoscience Faculty Workshop by March 16
Focused on teaching strategies, course design, research development, student mentoring, & work-life balance. Open to faculty in 1st 3 yr—priority given to those in their 2nd or 3rd year.
serc.carleton.edu/NA...
Focused on teaching strategies, course design, research development, student mentoring, & work-life balance. Open to faculty in 1st 3 yr—priority given to those in their 2nd or 3rd year.
serc.carleton.edu/NA...
Early Career 2025
Macalester College, Saint Paul, MN June 22-26, 2025, with an optional virtual visit to NSF on June 27, 2025 Apply by: March 16, 2025, using this application form Join us for a multi-day workshop in a stimulating ...
serc.carleton.edu
March 13, 2025 at 2:00 PM
Apply for @nagtgeo.bsky.social Early Career Geoscience Faculty Workshop by March 16
Focused on teaching strategies, course design, research development, student mentoring, & work-life balance. Open to faculty in 1st 3 yr—priority given to those in their 2nd or 3rd year.
serc.carleton.edu/NA...
Focused on teaching strategies, course design, research development, student mentoring, & work-life balance. Open to faculty in 1st 3 yr—priority given to those in their 2nd or 3rd year.
serc.carleton.edu/NA...