American Geophysical Union

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Official account of AGU. Promoting discovery in Earth & space science worldwide. Join us in taking action following the March for Science:

http://sharingscience.agu.org/takeaction

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We love maps. They tell us what the ocean floor looks like, show us where to find different minerals, show us where permafrost is vulnerable, and more. Check out these and more maps on Eos.org: https://eos.org/features/ten-mesmerizing-geophysical-maps-that-double-as-works-of-art

#maps #geoscience #geophysical #bathymetry #rocks #alaska #nature #mapping #permafrost #science
On May 29, 2006, mud started erupting from several sites on the Indonesian island of Java. Boiling mud, water, rocks and gas poured from newly-created vents in the ground, burying entire towns and compelling many Indonesians to flee. By September 2006, the largest eruption site reached a peak, and enough mud gushed on the surface to fill 72 Olympic-sized swimming pools daily.

Now, more than 11 years after it first erupted, researchers may have figured out why the mudflows haven’t stopped: deep underground, Lusi is connected to a nearby volcanic system. Read more about this research here: https://news.agu.org/press-release/scientists-determine-source-of-worlds-largest-mud-eruption/
The @usgs interactive geologic map of Alaska allows users to explore the different types of rocks! You can learn about how, when, and where they formed! Check it out in detail at bit.ly/AKGeologicMap #EarthScienceWeek #USGS #Alaska
On 10 October 2017, the co-chairs of the Earth and Space Science Caucus, Rep. Polis (D-CO) and Rep. Costello (R-PA) introduced a resolution to the House recognizing #EarthScienceWeek and #WorldSpaceWeek! 💫🔭🌎
Newly uncovered observations of an intense aurora seen in Kyoto, Japan in 1770 have helped scientists identify one of the largest geomagnetic storms known by scientists today. 
The new study, accepted for publication in Space Weather, a journal of the American Geophysical Union, used historical records from Japanese observers to estimate the aurora’s location and expanse. The authors claim the red aurora directly over Kyoto could been seen by communities more than 1,500 kilometers (930 miles) away, suggesting that the entire Japanese population likely experienced the event. 
The results of the study reinforce a growing notion that intense geomagnetic storms could potentially impact communities closer to the equator.  If strong enough, these storms can disrupt power grids, communication lines, and navigational systems. 
Credit: Matsusaka City 
#aurora #sciart #japan #space
Celebrate #EarthScienceWeek with us all week long to promote the awareness of geoscience and explore the relationship between human interaction and the Earth’s natural systems 🌎🔍 Credit: American Geosciences Institute
This is the last #SeismicECS post. Our crew is now back on land and ready to wrangle more seismic data. Visit csw.unols.org if you want to learn more about our research on the Cascadia Subduction Zone. Thanks for following along, and many thanks to NSF, UNOLS, the project PIs, R/V Revelle technicians and crew, and everyone else who made the 2017 Early Career Seismic Chief Scientist Training Cruise a phenomenal success. Photo: @by_rebecca #NSFfunded #scienceatsea
Night operations on the R/V Revelle: Work typically happens twenty-four hours a day during research expeditions so scientists can make their most of their time collecting data at sea. #SeismicECS was no different! Here, expedition scientists on the night shift oversee deployment of the #Scripps Multichannel Seismic System. Photo: Alexis Wright #NSFfunded #fieldwork #scienceatsea #guestgrammer
Sunset from the stern of the R/V Revelle. During #SeismicECS, Revelle towed a Multichannel Seismic System, which uses acoustic energy to “image” the subsurface. Geoscientists are interested in the Pacific Northwest coast because it sits on an active subduction zone capable of producing large earthquakes and tsunamis. New high resolution seismic data can help us understand the tectonic processes of the margin. Also, it turns out sunsets help with seasickness (although this hypothesis requires further testing). Photo: Emily Schottenfels #NSFfunded #scienceatsea
Graduate students Emily Schottenfels and Jessie Saunders work together in the R/V Revelle computer lab. During the #SeismicECS expedition, participants took turns being "Chief Scientist” during their shift, meaning they were responsible for communicating with the ship’s crew, managing data acquisition, coordinating the rest of the people on their watch, and much more. And now, these early career scientists are prepared to propose and lead their own seagoing research expeditions. Photo: @by_rebecca #NSFfunded #scienceatsea #womeninstem
On the R/V Revelle, #SeismicECS participants John Schmelz, Brendan Reilly, John DeSanto, and Maureen Walczak talk about their interpretations of a seismic profile acquired across the Cascadia Subduction Zone, off the Oregon coast. A seismic profile is like an ultrasound of the earth, which helps scientists image kilometers under the ocean floor and learn about the geological structure and stratigraphy of a given location. Photo: @by_rebecca #guestgramer #scienceatsea #NSFfunded #dataviz
Seismic profiles of the Cascadia Subduction Zone! The data the #SeismicECS participants acquired was processed on the ship so they could begin interpreting it right away. Each profile represents a track line from our expedition and shows the layers of sediments on the ocean floor. These images help researchers understand how the #geology below the seafloor might influence earthquakes in the Pacific Northwest. Photo: @by_rebecca #guestgrammer #scienceatsea #dataviz #NSFfunded