Shanaka de Silva retweeted
Ever feeling like that when you're doing your conference presentations?
ALT Great PhD comic on conference presentations.
How do volcanic systems recover after a supereruption? The answer may lie in zircon crystals like the one I am analyzing on the IMS 1300-HR3 at Curtin University in Perth, Australia. Scale bar (bottom left) is 100 microns. Stay tuned. @OSUCEOAS
With excellent post docs Alejandro Cisneros and Walter Báez using the Cameca IMS 1300 ion probe @JDLCentre to analyze zircons and allanites to contrain the timing of the run up eruptions at volcanoes from Indonesia, Argentina, Japan, Peru, Bolivia, and Saudi Arabia. #OSUCEOAS
Shanaka de Silva retweeted
🚨🌋 New eruption’s just started on Iceland’s Reykjanes Peninsula. With respect for those in the imperilled Grindavík, it’s so weird how this has become fairly normal and almost quotidian by this stage.
That’s good, by the way. Not normal = unpredictable and destructive.
Done! A productive week exploring a few more details of the worlds largest supervolcano, Toba. Rainy weather and thick jungle didn't put us off and we hit all our targets. With Indyo Pratomo, Alejandro Cisneros, Tushar Mittal, Axel Schmitt, Martin Danišìk, Gustam Lubis. 1 of 2 – at Central Region, Singapore
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For those interested in arc magmatism. This finally came out after a yeoman attempt by the first author to quantify regional eruption rates as accurately as possible. nature.com/articles/s43247-0… A useful dataset and some interesting insights. @OSUCEOAS @AucklandUni – at Corvallis, OR
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Shanaka de Silva retweeted
American Mineralogist:
3D zoning of barium in alkali feldspar
doi.org/10.2138/am-2022-8139
Lubbers et al. used (microCT) to observe 3D chemical zoning in natural sanidine minerals. Implications for petrological tools that interpret mineral zoning (e.g., diffusion chronometry)
Walking on the moon! Spectacular inflated pahoehoe, pahoehoe toes and glassy squeeze-outs in distal flow fronts from youngest (suspected <1000 years) basalt flow from Jabal Qidr in Harrat Khaybar, Saudi Arabia. @SgsOrgSa @KingSaudUni @ibnlaboun @OSUCEOAS
Interested in Quaternary volcanic chronology? Here is our latest Zircon Double Dating (ZDD) effort at Changbaishan/Tiancho volcano. nature.com/articles/s41598-0… – at Corvallis, OR
Shanaka de Silva retweeted
تعاوناً مع @GG_ksu أقامت @SgsOrgSa محاضرة علمية بعنوان " البراكين المنتشرة حول العالم وفي الحرات العربية “ قدمها البروفيسور شانكا دي سيلفا، أستاذ علم البراكين بجامعة ولاية أوريغون الأمريكية لتعريف المشاركين بالطرق المستخدمة في الظواهر البركانية المنتشرة حول العالم ودوافع دراستها.
Shanaka de Silva retweeted
Impresionante registro del pulso eruptivo de esta tarde en el Volcán Láscar captado por un grupo de excursionistas a solo metros del cráter.
Según reportan, debieron evacuar y descender inmediatamente del macizo, actualmente se encuentran a salvo. No hay personas lesionadas.
Lascar Volcano, Chile rumbles back to life. Vulcanian blast send ash upto 6km! – at Riyadh, Kingdom of Saudi Arabia
Shanaka de Silva retweeted
So Mauna Loa volcano on the Big Island of Hawai'i is erupting, after more than 38 years of quiescence (@USGSVolcanoes webcam image below). In order to try and keep false info from spreading, here are a few facts about this volcano and the new eruption.
Shanaka de Silva retweeted
First #eruption of #MaunaLoa since 1984 started around 09:30 UTC on Nov 28. Follow @USGSVolcanoes for updates. Webcam view of eruption onset in summit caldera:
usgs.gov/volcanoes/mauna-loa…
HVO Mauna Loa RED/WARNING - Eruption has commenced at Mauna Loa summit. Local hazards include lava flows, ash and ... bit.ly/3OLnNSf
Fortunate to spend a couple days around the famous Eifel and Laacher See with none other than Gerhard Wörner, Axel Schmitt, and Simon Turner among others. Haüyne is my new favourite mineral…spice blue (Dune reference).
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Shanaka de Silva retweeted
The misconception that there is no sound in space originates because most space is a ~vacuum, providing no way for sound waves to travel. A galaxy cluster has so much gas that we've picked up actual sound. Here it's amplified, and mixed with other data, to hear a black hole!