Earthquake engineeringEarthquake engineering is an interdisciplinary branch of engineering that designs and analyzes structures, such as buildings and bridges, with earthquakes in mind. Its overall goal is to make such structures more resistant to earthquakes. An earthquake (or seismic) engineer aims to construct structures that will not be damaged in minor shaking and will avoid serious damage or collapse in a major earthquake. A properly engineered structure does not necessarily have to be extremely strong or expensive.
Kanyakumari districtKanniyakumari district is one of the 38 districts of Tamil Nadu state and the southernmost district in mainland India. It stands second in terms of population density among the districts of Tamil Nadu. It is also the richest district in Tamil Nadu in terms of per capita income, and also tops the state in Human Development Index (HDI), literacy, and education. The district's headquarters is Nagercoil. Kanniyakumari district has a varied topography with the sea on three sides and the mountains of the Western Ghats bordering the northern side.
Nicobar IslandsThe Nicobar 'nIk@bɑːr Islands are an archipelagic island chain in the eastern Indian Ocean. They are located in Southeast Asia, northwest of Aceh on Sumatra, and separated from Thailand to the east by the Andaman Sea. Located southeast of the Indian subcontinent, across the Bay of Bengal, they are part of India, as the Nicobar district within the union territory of the Andaman and Nicobar Islands. UNESCO has declared the Great Nicobar Island as one of the World Network of Biosphere Reserves.
Mentawai Islands RegencyThe Mentawai Islands Regency are a chain of about seventy islands and islets approximately off the western coast of Sumatra in Indonesia. They cover 6,033.76 km2 and had a population of 76,173 at the 2010 Census and 87,623 at the 2020 Census. Siberut at is the largest of the islands. The other major islands are Sipura (or Sipora), North Pagai (Pagai Utara), and South Pagai (Pagai Selatan). The islands lie off the Sumatran coast, across the Mentawai Strait. The indigenous inhabitants of the islands are known as the Mentawai people.
Submarine earthquakeA submarine, undersea, or underwater earthquake is an earthquake that occurs underwater at the bottom of a body of water, especially an ocean. They are the leading cause of tsunamis. The magnitude can be measured scientifically by the use of the moment magnitude scale and the intensity can be assigned using the Mercalli intensity scale. Understanding plate tectonics helps to explain the cause of submarine earthquakes.
TsunamiA tsunami ((t)suːˈnɑːmi,_(t)sʊˈ- ; from 津波, tsɯnami) is a series of waves in a water body caused by the displacement of a large volume of water, generally in an ocean or a large lake. Earthquakes, volcanic eruptions and other underwater explosions (including detonations, landslides, glacier calvings, meteorite impacts and other disturbances) above or below water all have the potential to generate a tsunami.
SimeulueSimeulue sIm@'lu:ei is an island of Indonesia, off the west coast of Sumatra. It covers an area of 1,754 square kilometres (677 square miles), including minor offshore islands. It had a population of 80,674 at the 2010 census and 92,865 at the 2020 census. The official estimate as at mid 2021 was 93,762. Its capital is Sinabang. Simeulue was once a part of West Aceh Regency but was split off in 1999 and became a separate Simeulue Regency. From the ethnic point of view the inhabitants of Simeulue are similar to the people of neighboring Nias Island.
NiasNias (Pulau Nias, Nias language: Tanö Niha) (sometimes called Little Sumatra in English) is an island located off the western coast of Sumatra, Indonesia. Nias is also the name of the archipelago (Kepulauan Nias) of which the island is the centre, but also includes the Batu Islands to the south-east and the small Hinako Islands to the west. Nias Island covers an area of (including the Batu Islands to the south and minor offshore islands). It is mostly a lowland area rising to around above sea level.
VelankanniVelankanni (Vēḷāṅkaṇṇi), is a Special Grade Panchayat Town in Nagapattinam district in the Indian state of Tamil Nadu. It lies on the Coromandel Coast of the Bay of Bengal, 350 km south of Chennai (Madras), 12 km south of Nagapattinam, and 33 km southeast of Thiruvarur. Once a port that traded with Rome and Greece, the tiny commercial center gradually lost its importance to the larger city of Nagapattinam. The canal built to link this town with Vedaranyam still lies to the west.
Polar motionPolar motion of the Earth is the motion of the Earth's rotational axis relative to its crust. This is measured with respect to a reference frame in which the solid Earth is fixed (a so-called Earth-centered, Earth-fixed or ECEF reference frame). This variation is a few meters on the surface of the Earth. Polar motion is defined relative to a conventionally defined reference axis, the CIO (Conventional International Origin), being the pole's average location over the year 1900.
