Talk:1920 Haiyuan earthquake

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Requested move

I request to move 1920 Gansu earthquake to 1920 Haiyuan earthquake. The epicenter was in Haiyuan County, Zhongwei, now part of Ningxia. The reason why it was called Kansu earthquake is because Ningxia was merged to Gansu from 1914 to 1928 (see article Ningxia). Kansu is the Wade-Giles form of Gansu, an apparently outdated spelling now. Currently Hanyuan earthquake is a more common name for this earthquake. In Google Scholar, there are 31 hits for "Gansu earthquake" and 175 hits for "Haiyuan earthquake". In Google Book Search, there are 15 hits for "Gansu earthquake" and 53 hits for "Haiyuan earthquake". So I think we should move 1920 Gansu earthquake back to 1920 Haiyuan earthquake. And the current map Image:1920 Gansu earthquake.svg also confuses Gansu with Ningxia. Although it uses a historical map of the Republic of China, the administrative divisions in it were after 1928, not the time when the earthquake occurred. As I said above, in 1920, Ningxia was a part of Gansu, but this map shows Ningxia as a separate province and therefore the epicenter is in Ningxia according to this map. If we really want to use a historical map and use the outdated historical title Gansu earthquake, then at least we should use a map showing the epicenter in Gansu, historically. --Neo-Jay (talk) 20:27, 31 May 2008 (UTC)[reply]

Done you can add that explanation to the article, also--TheFEARgod (Ч) 12:36, 2 June 2008 (UTC)[reply]

Magnitude

The article says that the higher reported magnitudes are down to the media. In fact there are many scientific papers that give it a magnitude of 8.7 (e.g. [1]), although none of them specify precisely which scale they're talking about. Mikenorton (talk) 13:25, 7 November 2008 (UTC)[reply]

Time

Most sources that are not WP mirrors claim this happened at 20:06:53 or 8:06 pm local time. Some make the claim that this is in the UTC+8 zone and do the conversion to 12:06:53 UTC, but this always seems to be done in a way that it implies calculation from the 20:06:53 time. Why does the article state 19:06:53 local time? —[AlanM1(talk)]— 01:24, 1 June 2013 (UTC)[reply]

Lacking feedback to the contrary, I changed the time back to 20:06:53, UTC time to 13:06:53, and explained the offset in a note. —[AlanM1(talk)]— 23:54, 14 June 2013 (UTC)[reply]

Sorry not to respond before - the NGDC catalogue (the most complete global earthquake catalogue) gives 20:05:53 Beijing time and 12:05:53 UTC [2]. The UTC times quoted in that source come from seismologists who will be using times taken from seismographs, not back calculated from local times. The Beijing time comes from a catalogue of Chinese earthquakes, so should also be reliable - note that Beijing time was UTC+8 - this would explain the discrepancy. I am changing the article to the times in the NGDC source. Mikenorton (talk) 09:43, 15 June 2013 (UTC)[reply]

I'm lagging behind, too. The discrepancy claimed by SYSS Mouse here is that the quake area was UTC+7 at that time and Beijing was UTC+8. When I researched, I thought some sources claim a local time of 20:05, which would be inconsistent with the local time of 19:05 (UTC+7) calculated from 20:05 (Beijing; UTC+8) and 12:05 (UTC). I'm not finding that now. I'm puzzled, though, why the earthquake catalog would report a time in Beijing, when the epicenter was in a different time zone. It also seems more correct to report the correct local time in the article, not the time from some other time zone. The problem will be finding a source. Maybe we should settle for UTC, or at least add a note that the Beijing time is not the local time. —[AlanM1(talk)]— 23:56, 23 June 2013 (UTC)[reply]

Maybe the lack of a reliable equipment in the immediate area? Note that this took place during the Warlord Era, a period of political instability. SYSS Mouse (talk) 03:16, 24 June 2013 (UTC)[reply]

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H U H

in List of earthquakes in 1920, it gives a magnitude of 8.3; but it shows 7.8 in the main page. does anyone know how/why? --Iol_Iiz zy 14:34, 18 February 2021 (UTC)[reply]