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Earth of fire

Actualité volcanique, Articles de fond sur étude de volcan, tectonique, récits et photos de voyage

Publié le par Bernard Duyck
Publié dans : #Sismologie
Location of the Primary Earthquake in New Zealand - Doc. ESCM

Location of the Primary Earthquake in New Zealand - Doc. ESCM

Map of replicas and their feelings - 14.11.2016 - Doc. GeoNet

Map of replicas and their feelings - 14.11.2016 - Doc. GeoNet

The southern island of New Zealand was struck yesterday shortly after midnight by a very strong earthquake of M 7.5 and a depth of 15 km (GeoNet).
Feeling in the two large islands, it was followed by a hundred replicas, the most intense of magnitude 6.2.
Large 2.5-meter tsunami waves hit Kaikoura. The height of the waves of this localized tsunami was 1 meter in Christchurch and 0.5 m. In Wellington.
The first record shows two killed, the other damage is being assessed, but road infrastructure has been affected by the collapse and landslides in North Canterbury.

 Damage to infrastructure due to earthquakes - NZ / Twitter media
 Damage to infrastructure due to earthquakes - NZ / Twitter media

Damage to infrastructure due to earthquakes - NZ / Twitter media

Tsunami Warning on Highway - Relative Sea Level / NZ tsunami gauge network; A click to enlargeTsunami Warning on Highway - Relative Sea Level / NZ tsunami gauge network; A click to enlarge

Tsunami Warning on Highway - Relative Sea Level / NZ tsunami gauge network; A click to enlarge

Earthquake liquefaction in Wellington - photo Jodihaka / Twitter

Earthquake liquefaction in Wellington - photo Jodihaka / Twitter

These earthquakes involve several shallow inverse oblique faults located on or near the boundary between the Pacific and Indo-Australian plates.

At this location, the Pacific plate moves to the WSW at a rate of about 40 mm per year. The Kekerengu fault slipped more than 10 meters, the Hope fault underwent a minor movement, the Hundalee fault was also affected, and a new fault was identified at Waipapa Bay.
The peculiarity of the major earthquakes that hit New Zealand implies a break from one fault plane to another in a complex sequence ... already known during the Darfield episode in September 2010.

 Tectonic context and Malborough fault system - doc. GNS

Tectonic context and Malborough fault system - doc. GNS

Past earthquakes in New Zealand - Doc. The Weather Network

Past earthquakes in New Zealand - Doc. The Weather Network

Sources:


GeoNet - USGS Earthquake Hazards Program - ESCM - The Weather Network

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