2003 Fiordland earthquake

Earthquake in New Zealand October 2024April 2024 2003 Fiordland earthquake New Zealand usp000c5h6 7066570 yes 2003 08 22 12:12 AM 2003-08-21 12:12:49 7.2 s y 12 km on 8EXPO-CAT Earthquake Catalog https://earthquake.usgs.gov/static/lfs/data/pager/catalogs/ December 1, 2008 United States Geological Survey Version 2007-12 24 May 2025 -45.104 167.144 inline,title region:NZ New Zealand, South Island None en-UK The 2003 Fiordland earthquake struck the remote region of Fiordland in the South Island of New Zealand on 22 August 2003, at 12:12 am NZST. The epicentre was 12 km deep, and was thought to be near Secretary Island at the entrance to Doubtful Sound. At 7.2 s magnitude, it was one of the largest quakes in the country for some time, and was the largest shallow quake since the 1968 Inangahua earthquake. There was an aftershock two hours later at 2:12 am, followed over several days by frequent small tremors; two months after the earthquake, there had been 8,000 aftershocks. Fiordland is one of the seismically active parts of the country according to GNS seismologist Dr. Warwick Smith, as they are a relief mechanism for stresses as the Australian and Pacific tectonic plates are being forced together in the area, with the Pacific plate subducting under the Australian plate.Rogers 2013 181,182Wright 2014 24 In August 2004, there was another large earthquake of magnitude 7.1 w y in Fiordland.Wright 2014 172 This was the same location as an earthquake of 6.7 s y magnitude on 10 August 1993.Hicks Campbell 1998 70 Earthquake The magnitude 7.2 earthquake occurred on 22 August 2003, with an epicentre near Secretary Island in Fiordland.23 July 2009 Fiordland quake measures 7.8 https://www.stuff.co.nz/national/2597897/Fiordland-quake-measures-7-8 26 May 2024 Stuff New ZealandMcGinty Peter Robinson Russell 2007 The 2003Mw7.2 Fiordland subduction earthquake, New Zealand: aftershock distribution, main shock fault plane and static stress changes on the overlying Alpine Fault http://dx.doi.org/10.1111/j.1365-246x.2007.03336.x Geophysical Journal International 169 2 579–592 10.1111/j.1365-246x.2007.03336.x 2007GeoJI.169..579M 0956-540X The largest shallow earthquake with a magnitude this high in New Zealand occurred 35 years prior. There were over 8,000 recorded aftershocks in the two months following the main earthquake. Of these, 23 were at least magnitude five, and the largest measured 6.1.McGinty P. 2004 The 2003, MW 7.2 Fiordland Earthquake, and its nearsource aftershock strong motion data https://db.nzsee.org.nz/2004/Paper19.pdf 26 May 2024 New Zealand Society for Earthquake Engineering Damage The Earthquake Commission received about 3,000 damage claims, totalling $10.5 million. Most of the earthquake damage occurred in the township of Te Anau,16 July 2009 Geologists to keep watch after big quake https://www.odt.co.nz/news/national/geologists-keep-watch-after-big-quake 25 May 2024 Otago Daily TimesAnalysis of Te Anau residents' impacts, awareness & preparedness following the 2003 Fiordland earthquake » EQC Toka Tū Ake https://www.eqc.govt.nz/resilience-and-research/research/search-all-research-reports/analysis-of-te-anau-residents-impacts-awareness-and-preparedness-following-the-2003-fiordland-earthquake/ 26 May 2024 eqc.govt.nz with about 64% of residents experiencing damage, mostly minor. Some 70 km to the south-east of the town, residents felt the quake strongly and items fell off shelves in shops and homes.M 7.2 Fiordland Fri, Aug 22 2003 https://www.geonet.org.nz/earthquake/story/2103645 GeoNet 2 March 2024 Damage was generally minor, with some chimneys in Te Anau to Manapouri being cracked or broken. The earthquake also caused some concrete to crack in the control structure of Lake Te Anau, and collapses in Kepler Track.Hancox Cox Turnbull Crozier 2003 23-25 Landslides in Fiordland Landslides in Fiordland A team of geologists led by Ian Turnbull went to investigate and reported "landsliding on a large scale". They recorded at least 200 landslides after overflying seventy percent of central and western Fiordland.Rogers 2013 181,182 GNS Science recorded at least 400 landslides by November 2003.Hancox Cox Turnbull Crozier 2003 1 There was also a tsunami, which occurred in two separate locations. One of them was caused by a landslide, had a run-length of 4–5 metres, and affected several hundred metres of Charles Sound and damaged a wharf. The other part was recorded as far Port Kembla, on the east coast of Australia, with a peak-to-trough height of 0.17 metres.GeoNet M 7.2 Fiordland Fri, Aug 22 2003 https://www.geonet.org.nz/tsunami/story/2103645 26 May 2024 GeoNet The earthquake also caused liquefaction in several places, such as on the coast of Lake Te Anau. Compared to other large New Zealand earthquakes, the liquefaction was minor.Hancox Cox Turnbull Crozier 2003 20-23 Response Within 48 hours of the earthquake, two portable seismographs had been placed near the epicentre to record aftershocks. More portable seismographs were later used. See also 2009 Dusky Sound earthquake List of earthquakes in 2003 List of earthquakes in New Zealand Notes References November 2003 Reconnaissance studies of landslides and other ground damage caused by the MW7.2 Fiordland earthquake of 22 August 2003 https://static.geonet.org.nz/info/reports/landslide/SR_2003-030.pdf 26 May 2024 GeoNet G.T. Hancox S.C. Cox I.M. Turnbull M.J. Crozier Awesome Forces: The Natural Hazards that threaten New Zealand Hicks Geoff Campbell Hamish 1998 Te Papa Press Wellington 978-0-909010-58-4 registration https://archive.org/details/awesomeforcesnat0000unse Rogers Anna The Shaky Isles: New Zealand Earthquakes 2 1996 2013 Grantham House Wellington 978-1-86934-119-0 181, 182 Wright Matthew Living on shaky ground: The science and story behind New Zealand's earthquakes 2014 Random House (New Zealand) Auckland 978-1-77553-688-8 172 External links 7066570 Category:2003 earthquakes Fiordland earthquake Category:2003 disasters in New Zealand Category:August 2003 in Oceania Category:Earthquakes in New Zealand Category:History of the Southland Region Category:Fiordland