South Island Earthquakes - NZ, 02/03/2017

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Discussion Overview

The discussion centers around the recent earthquakes in the South Island of New Zealand, specifically a magnitude 4.7 and a magnitude 5.2 event that occurred on March 2, 2017. Participants explore the seismic activity in the region, its relation to previous earthquakes, and inquire about potential damages.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested, Experimental/applied

Main Points Raised

  • Some participants note that the recent earthquakes are part of the ongoing aftershock sequence following the November 2016 magnitude 7.8 earthquake.
  • One participant shares links to seismic data and reports, indicating the intensity and depth of the recent quakes.
  • Another participant references a previous thread discussing the complex geological situation in the northeastern part of the South Island.
  • There is a query about the extent of damages caused by the recent earthquakes, with some suggesting that any damage may be minor.
  • Participants mention the frequency of aftershocks in the region, indicating that seismic activity remains high.

Areas of Agreement / Disagreement

Participants generally agree that the recent earthquakes are related to ongoing seismic activity in the region, but there is uncertainty regarding the extent of damages and the specifics of the geological situation. No consensus is reached on the overall impact of the earthquakes.

Contextual Notes

Limitations include a lack of detailed information on damages and the reliance on various seismic reports, which may have differing interpretations of the events.

StevieTNZ
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http://www.nzherald.co.nz/nz/news/article.cfm?c_id=1&objectid=11810298 (details about the quake are a bit off, but I am sure will be updated)

1. http://www.geonet.org.nz/quakes/region/newzealand/2017p161294

2. http://www.geonet.org.nz/quakes/region/newzealand/2017p161601

Pretty scary for all those that were caught up in the Christchurch earthquakes, and last November's Kaikoura quakes.

A number of smaller ones, as well -- http://www.geonet.org.nz/quakes/felt

EDIT: added this link -- http://www.stuff.co.nz/the-press/news/89962309/severe-magnitude52-earthquake-rattles-canterbury
 
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hi guys

these latest 2 respectable events, a M 4.7 and a M 5.2 are part of the ongoing aftershock sequence of the November M 7.8 event.

  • 173E43S-strong.png

Intensity
strong
Region intensity moderate
NZDT Thu, Mar 2 2017, 5:17:44 am
Depth 9 km
Magnitude 4.7
Location 20 km south-west of Cheviot
Felt it? quake details...

and

  • 173E43S-severe.png

Intensity
severe
Region intensity strong
NZDT Thu, Mar 2 2017, 8:01:02 am
Depth 12 km
Magnitude 5.2
Location 20 km south-west of Cheviot
Felt it? quake details...

as commented in the reports, both events would have been strongly felt in the epicentral region.Dave
 
Last edited:
here's the Kaikoura seismic recorder for the last 24 hrs
Kaikoura is around 75 km NE of the events
Christchurch is around 77 km SSW of the events

The M 4.7 is on the right edge and the M 5.2 lower centre
as can also be seen, the region is still very active with several dozen aftershocks a day

khz-seismic-drum.png


Dave
 
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fresh_42 said:
There wasn't anything on the news here. What is known about damages?
There may be minor damage, but nothing significant to warrant a news article (at least, so far).

davenn said:
these latest 2 respectable events, a M 4.7 and a m 5.2 are part of the ongoing aftershock sequence of the November M 7.8 event.
Ah I see.
 

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