Talk:1868 Arica earthquake

A fact from 1868 Arica earthquake appeared on Wikipedia's Main Page in the Did you know column on 7 March 2010 (check views). The text of the entry was as follows: Did you know... that the tsunami triggered by the 1868 Arica earthquake, that led to 25,000 deaths in Peru and northern Chile, caused damage and at least one death in New Zealand? A record of the entry may be seen at Wikipedia:Recent additions/2010/March.

A fact from this article was featured on Wikipedia's Main Page in the On this day section on August 13, 2012, August 13, 2014, August 13, 2017, August 13, 2018, August 13, 2020, and August 13, 2023.

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According to Okal's paper, the quake was 10^30 dyne cm. Using the seismic moment to moment magnitude conversion Mw=2/3(log10(M0)−10.7) where M0 is seismic moment, I am left with a moment magnitude of 9.3. The author also agrees that this is correct offering a moment magnitude of 9.27 themselves.

--SamBroGaming (talk) 04:59, 10 March 2022 (UTC)[reply]

FYI - There are some other articles on Wikipedia that have this taking place on August 16 - all of them seem to reference [1]. I'm not sure if there is any truth to that date. — RockMFR 21:05, 28 February 2010 (UTC)[reply]

Looking at google results for August 16, most of the hits relate to those other wikipedia pages. In google scholar, I couldn't find any sources that said August 16, other than this, which gives August 13 for the Arica quake, but interestingly also describes an earthquake in Ecuador on August 16. Maybe that is the origin of the confusion. BTW fascinating accounts in that book, when I get some time I might add some of that to the article. Cheers, Mikenorton (talk) 21:22, 28 February 2010 (UTC)[reply]

Using Google Books just now I quit after finding 6 books (published from 1877 to 2011, all different authors) that date the 1868 event to August 13. For example. Appears the USC author needs to do some checking!! Twang (talk) 03:32, 2 April 2014 (UTC)[reply]

This paragraph sounds like it might need to be updated because I am not sure if they are talking about the recent 8.2 that struck at Iquique there. Someone might want to check on that and edit the front page of this article. Thank-You!!! EQ GuyLesbrown99 (talk) 06:44, 18 April 2014 (UTC)[reply]

Zamudio et al in 2005 (ref no.4) stated "Results of this work indicate the probable occurrence of a very large earthquake with Mw 8.6 in the northern Chile portion of Peru-Chile Border Region, around the year 2010, and in the southern Peruvian portion of that region may occur a large earthquake with Mw 8.8, around the year 2126." So a repeat of the Arica 1868 event remains likely according to this analysis, although the recent earthquake fulfils the first part of this forecast - I'll think about how to adjust the text to match this - I think that I may have misread the reference when I created this article. Thanks for pointing this out. Mikenorton (talk) 08:33, 18 April 2014 (UTC)[reply]

LOOKS GOOD!!! Thank-You Again, Mike!!! LES Lesbrown99 (talk) 03:30, 21 April 2014 (UTC)[reply]

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