Talk:1835 Concepción earthquake

A fact from 1835 Concepción earthquake appeared on Wikipedia's Main Page in the Did you know column on 5 November 2010 (check views). The text of the entry was as follows:

Did you know... that Charles Darwin experienced the 1835 Concepción earthquake, describing the effects of both the earthquake and the subsequent tsunami?

A record of the entry may be seen at Wikipedia:Recent additions/2010/November.

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A fact from this article was featured on Wikipedia's Main Page in the On this day section on February 20, 2019 and February 20, 2020.

Chile Low‑importance

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Inconsistencies

The magnitude of 8.2 Mfa is not cited to a reliable source. The NOAA article that's linked says 8.2 Ms, but it shows a different time for the earthquake, so there is some discrepancy between this article and the sources. —howcheng {chat} 08:24, 19 February 2018 (UTC)[reply]

I've changed it to Ms and adjusted the citations. I added the Mfa back in 2010, so I can only imagine that the NOAA page has been updated since then (or I screwed up originally). The timing is a puzzle - the quote from the CERESIS catalogue on the NOAA page gives 15:30 UTC, which is what I used, but I've no idea where the 16:22 from the top of that same page came from as it's not supported by one of the quoted sources - it's difficult when sources are themselves inconsistent. Mikenorton (talk) 12:37, 19 February 2018 (UTC)[reply]

I checked the Utsu Catalog of Damaging Earthquakes in the World [1], and this also gives 15:30 UTC. It is of course possible that nobody knows exactly the timeshift between the local time in Chile in 1835 and GMT, as it was then. I guess that CERESIS assumes a 4-hour difference as is the case now. Mikenorton (talk) 12:57, 19 February 2018 (UTC)[reply]

True, Universal Time wasn't adopted until 1884. Thanks for the fixes. —howcheng {chat} 18:44, 19 February 2018 (UTC)[reply]