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The Pacific Ring of Fire, with trenches marked with blue lines Global earthquakes (1900–2013): Earthquakes of magnitude ≥ 7.0 (depth 0–69 km (0–43 mi)): Active volcanoes Global map of subduction zones, with subducted slabs contoured by depth Diagram of the geological process of subduction
The 1,600 kilometres (990 mi) [4] long Macquarie fault zone (also known as the Macquarie Ridge, its gazetted name since 2015, [7] the Macquarie Ridge complex or historically as the Macquarie Fault) [Notes 1] is a major right lateral-moving transform fault along the seafloor of the south Pacific Ocean which runs from New Zealand southwestward towards the Macquarie triple junction.
[7] [4] [5] Seafloor core evidence indicates that there have been forty-one subduction zone earthquakes on the Cascadia subduction zone in the past 10,000 years, suggesting a general average earthquake recurrence interval of only 243 years. [2] Of these 41, nineteen have produced a "full margin rupture", wherein the entire fault opens up. [7]
Macquarie Fault Zone >400: South Pacific Ocean: Fault (geology)#Strike-slip faults: Active: 1989 Maquarie Isl. (8.2), 2008 Macquarie Island earthquake (M7.1) Mae Chan Fault: 120: Thailand and Laos: Sinstral: Active: 2007 Laos (M6.3) Magallanes–Fagnano Fault: South America: Transform: Main Boundary Thrust: 2000: Himalaya: Thrust: Active ...
To map the subduction zone, researchers at sea performed active source seismic imaging, a technique that sends sound to the ocean floor and then processes the echoes that return. The method is ...
The Vanuatu subduction zone (previously called New Hebrides subduction zone) is currently one of the most active subduction zones on Earth, producing great earthquakes (magnitude 8.0 or greater), with potential for tsunami hazard to all coastlines of the Pacific Ocean. [2] [3] There are active volcanoes associated with arc volcanism.
Map of the Chile Rise and its fracture zones in Nazca and the Antarctic plates Active Pacific Ocean fracture zones are perpendicular to the mid-ocean ridges (black lines) in orange shaded region. Since the map was prepared ages not shown of south-west Pacific and north Pacific Ocean floors may have been characterised.
A hole in a 600-mile-long fault line has been discovered at the bottom of the Pacific ocean - and it could be the trigger of a magnitude-9 earthquake on the US coast. Just outside of Oregon ...