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paleoseismicity.org

@paleoseismicity.bsky.social

All things earthquakes, paleoseismology, active faulting. http://paleoseismicity.org

94 Posts2014 Follower317 Folgt
John Dehls@john.dehls.net · last wk.

Our thoughts about this are expanded in this paper, just released after the ISPRS meeting in Toronto. isprs-archives.copernicus.org/articles/XLI...

ISPRS-Archives - From InSAR Norway to a Global Ground Motion Service: Operational Monitoring for Disaster Risk Reduction

isprs-archives.copernicus.org

John Dehls@john.dehls.net · 11mo ago

Why are we organizing this? To push forward a new initiative: making life-saving ground motion data available worldwide, especially where it’s needed most.

Partial globe showing coverage by the European Ground Motion Service, showing dense deformation measurements. Highlights how some regions have access to life-saving data, while most of the world does not.
Julie Elliott@julieelliott.bsky.social · last mo.

On July 9, 1958, a M7.8 earthquake ruptured the Fairweather fault (a right-lateral transform fault) in southeast Alaska. The quake triggered a massive rockslide/landslide into the head of Lituya Bay (a fjord), which in turn generated the largest ever recorded tsunami (524 m/1720 ft!). ⚒️🧪🌊

A map of Lituya Bay, along the coast of southeast Alaska. The map shows the area of the landslide at the head of the fjord, elevation contours, and limits of the areas where the tsunami stripped away trees and other cover from bedrock (these areas extend all throughout the fjord). A red dashed line at the head of the fjord marks the location of the Fairweather fault, the right-lateral transform fault that slipped during the earthquake. The map is from Miller, 1960 (see comment for full citation) and was modified by me (I added the Fairweather fault location).Sketch comparing the height of the Lituya Bay tsunami wave (524 m) to the height of the several buildings including the Burj Khalifa (828 m, tallest building in the world), Empire State (443 m), and Eiffel Tower (324 m). Credit: Phoenix CZE, Wikimedia Commons, CC-BY-SA 4.0.Aerial view of Lituya Bay after the earthquake and tsunami. The edges of the bay show light colored areas where trees and other vegetation have been stripped down to the bedrock. Photo Credit: USGS, Don Miller.Aerial view of the head of Lituya Bay. The landslide scar is in the right corner. in the right middle is Lituya Glacier, the end of which was shattered by the landslide/rockfall. In the middle left, a slope with dark colored trees on top has been stripped down to bedrock up to a height of 524 m by the tsunami. Photo Credit: USGS, Don Miller. Plate published in USGS Professional Paper 354-C, 1960.
Will Thomas@williamthomas.bsky.social · 2mo ago

Once more, because glaciology and tectonics are wonderful subjects everyone should know more about, as is the roller-coaster history of speculative geology. Also, ETH Zürich has an outstanding online image library that offered some great photo options. Also, Albert Heim had an amazing beard.

Will Thomas@williamthomas.bsky.social · 2mo ago

In today's AIP History Weekly Edition, we look at Andrea Westermann's recent @hsnatsci.bsky.social article on Albert Heim's late-19c. work in glaciology and tectonics. Heim combined fieldwork, lab studies, and physical analysis to ground speculation about the plasticity and motion of ice and rock.

Henning@geohenning.bsky.social · last mo.

The Ridgecrest M7.1 #earthquake sequence in California is already 7 years old on this day. Here's an interesting story by the USGS which was released for the 5-year anniversary. ⚒️ #Geology 🧪 www.usgs.gov/news/feature...

Five Years After the Ridgecrest Earthquake Sequence

On July 4th, 2019, as millions of Southern Californians looked forward to fireworks and other celebrations, earthquake shaking rumbled across much of California, causing tall buildings in the Los Ange...

usgs.gov

paleoseismicity.org@paleoseismicity.bsky.social · 2mo ago

Potentially a new earthquake environmental effect for the ESI2.0: mud volcano eruption triggered 700 km from the epicenter?

Callan Bentley@callanbentley.bsky.social · 2mo ago

Really interesting footage from Galfa, southern Trinidad, after the Venezuelan earthquake doublet: youtu.be/4M8UpZYz4ss?... ⚒️ 1) significant uplift of a section of coast with lots of small faults 2) fascinating zone where boulders trapped sea life, now elevated

Earth and Planetary Sciences at ETH Zurich@eth-eaps.bsky.social · 2mo ago

The Engineering Geology group at ETH Zurich is looking for a doctoral student with a strong interest in fluid mechanics and numerical modelling to develop a new coupled solid/fluid mechanics-based numerical model to simulate the motion of debris flows. #phd #jobalert

PhD Position in Numerical Modelling of Debris Flows

The Chair of Engineering Geology (Prof. Dr. Jordan Aaron, Geological Institute) is looking for a creative and motivated PhD candidate with a strong interest in fluid mechanics and numerical…

jobs.ethz.ch