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The news story: https://www.cbc.ca/radio/quirks/tsunami-chicxulub-impact-1.6608823 The full open access paper: Range, M. M., Arbic, B. K., Johnson, B. C., Moore, T. C., Titov, V., Adcroft, A. J., et al. (2022). The Chicxulub impact produced a powerful global tsunami. AGU Advances, 3, e2021AV000627. https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2021AV000627

Scientists find evidence of largest earthquake in human history 3,800 years ago By Sommer Brokaw, UPI, April 19, 2022 Live Science, July 19, 2022, article Salazar, D., Easton, G., Goff, J., Guendon, J.L., González-Alfaro, J., Andrade, P., Villagrán, X., Fuentes, M., León, T., Abad, M. and Izquierdo, T., 2022. Did a 3800-year-old M w~ 9.5 earthquake trigger major social disruption in the Atacama Desert?. Science advances, 8(14), no. eabm2996. Open access paper Yours, Paul H.

The Long-Lost Tale of an 18th-Century Tsunami, as Told by Trees Local evidence of the cataclysm has literally washed away over the years. But Oregon’s Douglas firs may have recorded clues deep in their tree rings. Max G. Levy, Wired Magazine, September 29, 2021 the paper is: Dziak, R. P., Black, B. A., Wei, Y., and Merle, S. G., 2021, Assessing local impacts of the 1700 CE Cascadia earthquake and tsunami using tree-ring growth histories: a case study in South Beach, Oregon, USA, Nat. Hazards Earth Syst. Sci., 21, 1971-1982. Related paper is; Patton, J. R., Goldfinger, C., Morey, A. E., Romsos, C., Black, B., Djadjadihardja, Y., and Udrekh: Seismoturbidite record as preserved at core sites at the Cascadia and Sumatra-Andaman subduction zones, Nat. Hazards Earth Syst. Sci., 13, 833-867. Yours, Paul H.

Giant tsunami from dino-killing asteroid impact revealed in fossilized ‘megaripples’ By Akila Raghavan, AAAS Science, Jul. 12, 2021 The paper is: Kinsland, G.L., Egedahl, K., Strong, M.A. and Ivy, R., 2021. Chicxulub impact tsunami megaripples in the subsurface of Louisiana: Imaged in petroleum industry seismic data. Earth and Planetary Science Letters, 570, no.117063. Yours, Paul H.

I can't find much history or geological information of the Seattle area in Washington State before the people started settling there. I get lots of history about how everyone settled, who they were, dates of events, and the beginning of industries. Is there a easier way to find out through other resources about actual formations of the land and geological events that have happened in the past throughout the centuries? Is that made available to the public for research in their findings of fossils? There's more then I thought to learn about when it comes to fossils, and when it comes to fossils being found in or out of profound areas where you don't know how it may have got there, takes you more on a history hunt for answers to the how? question, and the when? question. Finding a fossil in someplace that makes you scratch your head???.. I'm sure this has happened many times. Hasnt it?.. Ocean animal fossils no where near the ocean? I believe that would be evidence of a past tsunami. Could there be any reason why sea fossils would be found in the middle of a populated city not really that close to a Ocean but close to a man made lake. Half salt water half fresh water. I think there should be a key importance to explore more of city populated areas before major construction. Seattle is a place that has never been explored geologically so much other then the beach along the coastlines. I find no evidence of geological history of Washington but of our volcanoes, not so much tsunamis at all. Seattle has just been built on top of so quickly, that Seattle hides a whole lot more beneath the high rolling hills and valleys surrounding then we think. There are less and less places to explore in a growing city and I'm not a expert, but when I can notice something out of the ordinary and you know it's of importance, how can it not excite you enough to find out more about it! So who's the first one I would call to report a geological formation of importance? How are those steps determined in the concept of discoveries ownership and so on? The laws are so twisted and much goes into it. The reward it's self in fossil hunting or just stumbling upon one is the past answers they give us, but they are our future answers too!

Ancient DNA from Doggerland and the Storegga Tsunami Breakthrough in studying ancient DNA from Doggerland that separates the UK from Europe, University of Warwick, July 16, 2020 Link to article Scientists have studied sedimentary ancient DNA (sedaDNA) from sediment deposits in the southern North Sea, an area which has not previously been linked to a tsunami that occurred 8150 years ago. The paper is: Gaffney, V., Fitch, S., Bates, M., and others, 2020. Multi-Proxy Characterisation of the Storegga Tsunami and Its Impact on the Early Holocene Landscapes of the Southern North Sea. Geosciences, 2020; 10 (7): 270 Link to Gaffney et al. (2020) open access paper Related paper is: Gearey, B.R., Hopla, E.J., Boomer, I., Smith, D., Marshall, P., Fitch, S., Griffiths, S. and Tappin, D.R., 2017. Multi-proxy palaeoecological approaches to submerged landscapes: a case study from ‘Doggerland’, in the southern North Sea. The archaeological and forensic applications of microfossils: a deeper understanding of human history. The Micropalaeontological Society Special Publications. Geological Society, London, pp.35-53. Researchgate link to Gearey et al. (2017) Link to other papers by Peter Marshall A similar paper about New Zealand tsunamis is: Goff, J., Pearce, S., Nichol, S.L., Chagué-Goff, C., Horrocks, M. and Strotz, L., 2010. Multi-proxy records of regionally- sourced tsunamis, New Zealand. Geomorphology, 118(3-4), pp.369-382. Link to Goff et al. (2017) about New Zealand tsunamis Yours, Paul H.

Martian Meteor Collision May Have Triggered a 1,000-Foot Tsunami https://www.livescience.com/66088-mars-tsunami-ground-zero.html https://www.space.com/mars-ocean-mega-tsunami-impact-crater.html https://bgr.com/2019/08/05/mars-crater-tsunami-study-asteroid/ The paper is: Costard, F., Séjourné, A., Lagain, A., Ormö, J., Rodriguez, J.A.P., Clifford, S., Bouley, S., Kelfoun, K. and Lavigne, F., 2019. The Lomonosov Crater Impact Event: A possible Mega‐tsunami Source on Mars. Journal of Geophysical Research: Planets. https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2019JE006008 Another paper is: Rodriguez, J.A.P., Fairén, A.G., Tanaka, K.L., Zarroca, M., Linares, R., Platz, T., Komatsu, G., Miyamoto, H., Kargel, J.S., Yan, J. and Gulick, V., 2016. Tsunami waves extensively resurfaced the shorelines of an early Martian ocean. Scientific reports, 6, p.25106. https://www.nature.com/articles/srep25106 http://cab.inta-csic.es/uploads/noticias/adjuntos/20160519151549.pdf http://www.cab.inta.es/uploads/noticias/adjuntos/20160519151549.pdf Yours, Paul H.