How many active trenches are there in the Philippines?
There are five active fault lines in the country namely the Western Philippine Fault, the Eastern Philippine Fault, the South of Mindanao Fault, Central Philippine Fault and the Marikina/Valley Fault System.
Is Mariana Trench located in the Philippines?
Located in the western Pacific east of the Philippines and an average of approximately 124 miles (200 kilometers) east of the Mariana Islands, the Mariana Trench is a crescent-shaped scar in the Earth’s crust that measures more than 1,500 miles (2,550 kilometers) long and 43 miles (69 kilometers) wide on average.
What is the longest trench in the Philippines?
The Emden Deep, also known as the Galathea Deep or Galathea Depth, is the portion of the 10,540-metre-deep (34,580 ft) Philippine Trench exceeding 6,000-metre (20,000 ft) depths in the south-western Pacific Ocean.
Where is the Manila Trench?
The Manila Trench is an oceanic trench in the Pacific Ocean, located west of the islands of Luzon and Mindoro in the Philippines. The trench reaches a depth of about 5,400 metres (17,700 ft), in contrast with the average depth of the South China Sea of about 1,500 metres (4,900 ft).
What are trenches?
A trench is a type of excavation or depression in the ground that is generally deeper than it is wide (as opposed to a wider gully, or ditch), and narrow compared with its length (as opposed to a simple hole or pit). … In trench warfare, soldiers occupy trenches to protect them against weapons fire.
Where is the Mariana Trench?
The Mariana Trench, in the Pacific Ocean, is the deepest location on Earth. According to the Exclusive Economic Zone (EEZ), the United States has jurisdiction over the trench and its resources. Scientists use a variety of technologies to overcome the challenges of deep-sea exploration and explore the Trench.
Where is the Tonga Trench?
Tonga Trench, submarine trench in the floor of the South Pacific Ocean, about 850 miles (1,375 km) in length, forming the eastern boundary of the Tonga Ridge; the two together constitute the northern half of the Tonga-Kermadec Arc, a structural feature of the Pacific floor completed to the south by the Kermadec Trench …
Who called the Philippines as Ma Yi?
The Sung Chinese called the Philippines Ma-i. The book Chu Fan Chi (Zhu Fan Zhi or Description of Various Foreigners) written by customs official Zhao Rukuo (Chao Ju-kua) in 1225, which narrates pre-Hispanic Philippine history during the Song dynasty (960-1279).
How are trenches formed?
In particular, ocean trenches are a feature of convergent plate boundaries, where two or more tectonic plates meet. At many convergent plate boundaries, dense lithosphere melts or slides beneath less-dense lithosphere in a process called subduction, creating a trench.
Is tsunami possible in Manila?
The Philippines is vulnerable to tsunami due to the presence of offshore faults and trenches such as Manila Trench, Negros Trench, Sulu Trench, Cotabato Trench, Philippine Trench, and East Luzon Trough.
What are ocean trenches? Ocean trenches are steep depressions in the deepest parts of the ocean [where old ocean crust from one tectonic plate is pushed beneath another plate, raising mountains, causing earthquakes, and forming volcanoes on the seafloor and on land.
How are trenches in the Philippine Mobile Belt formed?
The Cagayan River Basin is an intra-arc rift. Subduction of Late Oligocene to Early Miocene South China sea oceanic crust occurs at the Manila Trench. Subduction of Eocene Philippine Sea oceanic crust occurs at the East Luzon Trough – Philippine Trench system.