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QS Regular Matrix. Quadraphonic Sound (originally called Quadphonic Synthesizer, and later incorrectly referred to as RM or Regular Matrix) was a phase amplitude matrix 4-channel quadraphonic sound system for phonograph records. The system was based on technology created by Peter Scheiber, but further developed by engineer Ryosuke Ito [1] [2 ...
On 10 April 1815, an eruption of VEI 7 caused a localized tsunami. Tsunami of 4 metres (13 ft) in Sanggar, 1 to 2 m (3 ft 3 in to 6 ft 7 in) in Besuki, Java Island and 2 m (6 ft 7 in) in the Molucca Islands. 1819: Gujarat, India: 1819 Rann of Kutch earthquake: Earthquake: On 16 June 1819, a local tsunami inundated the Great Rann of Kutch: 1833
The 2009 Dusky Sound earthquake was a Mw 7.8 earthquake that struck a remote region of Fiordland, New Zealand, on 15 July at 21:22 local time (09:22 UTC). It had a depth of 12 km (7.5 mi), and an epicentre near Dusky Sound in Fiordland National Park, which is 160 km (99 mi) north-west of Invercargill. [1] [2] It was the country's largest ...
In seismology, a tsunami earthquake is an earthquake which triggers a tsunami of significantly greater magnitude, as measured by shorter-period seismic waves. The term was introduced by Japanese seismologist Hiroo Kanamori in 1972. [1] Such events are a result of relatively slow rupture velocities. They are particularly dangerous as a large ...
A megatsunami is a tsunami with an initial wave amplitude measured in many tens or hundreds of metres. A megatsunami is a separate class of event from an ordinary tsunami and is caused by different physical mechanisms. Normal tsunamis result from displacement of the sea floor due to movements in the Earth's crust (plate tectonics).
The 2018 Sunda strait tsunami ( Indonesian: Tsunami Selat Sunda 2018) occurred on 22 December 2018 at around 21:38 local time after large parts of the southwestern side of Anak Krakatoa collapsed onto its caldera. [5] The landslide spawned a massive tsunami wave that struck multiple coastal regions in Banten and Lampung, including the popular ...
The tsunami warning was issued within 3 minutes with the most serious rating on its warning scale during the 2011 TÅhoku earthquake and tsunami; it was rated as a "major tsunami", being at least 3 m (9.8 ft) high. An improved system was unveiled on March 7, 2013 following the 2011 disaster to better assess imminent tsunamis.
Dynaquad. Dynaquad, or DY, was a matrix decoder 4-channel quadraphonic sound system developed by Dynaco in 1969. [1] [2] [3] The system originally had four speakers that were arranged in a diamond shape (centre-front, centre-left, centre-rear, centre-right). [4] [5] Initially (first available in 1969 with th Dynaco SCA-80Q amplifier [6] ), it ...