Editing 1931 Hawke's Bay earthquake (section)

==Aftershocks==
{{Over-quotation|section=y|date=May 2024}}
On 13 February, Hawke's Bay was struck by a 7.3 {{m|s}} aftershock. At the time, this was New Zealand's fourth strongest recorded earthquake. Author Matthew Wright reported that "the power failed three seconds before the earthquake was felt in Napier. People from Napier to [[Dannevirke]] ran for their lives as previously damaged buildings cracked and fell".<ref name="owdjim77">{{cite web|url=http://wildland.owdjim.gen.nz/?p=77 |title=Hawke's Bay Earthquakes 1931 « Wild Land |publisher=Wildland.owdjim.gen.nz |date=13 February 2006 |access-date=18 June 2015}}</ref> He added "Some inland parts of Hawke's Bay felt this aftershock more strongly than 3 February quake ... but 'there was no damage of any moment'. People rushed into the streets in Dannevirke and Masterton. In Wellington all but one of the clocks stopped working in the Dominion Observatory, and ceiling lights in the Evening Post offices swayed 'more vigorously' than they had the week before".<ref name="owdjim77"/> The earthquake of 13 February 1931 is widely regarded as an aftershock of the larger event ten days earlier. But Messrs Adams, Barnett and Hayes commenting on the rapid decline in the frequency of aftershocks in the Journal of Science & Technology stated, "The fresh outbreak on the 13th February, due to the severe shock on that date, may almost be regarded as a separate disturbance, although it probably arose from conditions produced by the original shock on the 3rd".{{Citation needed|date=May 2024}}

Aftershocks continued to shake Hawke's Bay frequently until July 1931, where the average aftershock occurrence dropped to less than one daily. Aftershocks continued for several years, with the last major jolt shaking the Bay in April 1934.{{Citation needed|date=May 2024}}

Below is a list of all recorded aftershocks following the main event.

{| class="wikitable sortable"
|+
! Year !! Month !! Date !! Number of aftershocks !! Largest shock
|-
| 1931 || February || || 597 || 
|-
| || || 3 February || 151 || 5.5 {{m|s|link=y}}
|-
| || || 4 February || 55 ||
|-
| || || 5 February || 50 || 
|-
| || || 6 February || 29 || 
|-
| || || 7 February || 24 || 
|-
| || || 8 February || <20 ||  6.4 {{m|s|link=y}}
|-
| || || 9 February || <20 || 
|-
| || || 10 February || <20 ||
|-
| || || 11 February || <20 || 
|-
| || || 12 February || <20 || 
|-
| || || 13 February || 81 || 7.3 {{m|s|link=y}}
|-
| || || 14 February || 23 || 
|-
| || || 15 February || 18 ||
|-
| || || 16 February || 19 || 
|-
| 1931 || March || || 75 ||
|-++ {{m|s|link=y}}
| 1931 || April || || 52 || 5.5 {{m|s|link=y}}
|-
| 1931 || May || || 40 || 6.0 {{m|s|link=y}}
|-
| 1931 || June || || 40 ||
|-
| 1931 || July || || 26 || 
|-
| 1931 || August || || 17 ||
|-
| 1931 || September || || 20 || 
|-
| 1931 || October || || 16 || 
|-
| 1931 || November || || 19 ||
|-
| 1931 || December || || 14 || 
|-
| 1932 || May || || || 5.9 {{m|s|link=y}}
|-
| 1932 || September || || || 6.9 {{m|s|link=y}}
|-
| 1934 || March || || || 6.3 {{m|s|link=y}}
|-
| 1934 || April || || || 5.6 {{m|s|link=y}}
 
|}

In all, 597 earthquakes were recorded at Hastings in February 1931, and more than 900 by the end of December 1931.<ref name="owdjim77"/><ref>Alan G. Hull (1990) Tectonics of the 1931 Hawke's Bay earthquake, New Zealand Journal of Geology and Geophysics, 33:2, 309–320, {{doi|10.1080/00288306.1990.10425689}}</ref>