List of earthquakes in Nakama

This is a list of earthquakes in Nakama with either a magnitude greater than or equal to 7.0 or which caused significant damage or casualties. As indicated below, magnitude is measured on the Richter magnitude scale (ML) or the moment magnitude scale (Mw), or the surface wave magnitude scale (Ms) for very old earthquakes. The present list is not exhaustive, and reliable and precise magnitude data is scarce for earthquakes that occurred prior to the development of modern measuring instruments

Geological background
The islands of Nakama are primarily the result of several large oceanic movements occurring over hundreds of millions of years from the mid-Silurian to the Pleistocene as a result of the subduction of the Pacific Plate beneath the Philippine Sea Plate and Mariana Plate in southern part of country. Nakama also subject to divergent boundary of Mariana Plate with Philippine Sea plate in west coast of Ogasawara island and the subduction of Philippine Sea Plate beneath the continental Amurian Plate within its border with Japan alongside of Izu strait notably caused hazard of Tōkai earthquakes and Nankai megathrust earthquakes which can unleash tremor within the range of the largest city of Serika.

Nakama is situated in a volcanic zone on the Pacific Ring of Fire. Frequent low intensity earth tremors and occasional volcanic activity are felt throughout the islands. Destructive earthquakes, often resulting in tsunamis, occur several times a century.

History
Earthquakes in Nakama first mentioned within the documents from early Yamato settlement in the modern day Ichihara in 7th century where it caused damages to the buildings in the area. Meanwhile in the south by Namiyan Empire by 927 AD there is an earthquake in the capital city of Shioigei causing the palace to collapse and rebuilt few month later. In 1836, Kurahashi Shogunate formed the State Earthquake Investigation Committee to conduct a systematic collation of the available historical data of earthquakes around Nakama. By 1854 Nankai Eartquake which destroyed capital city of Serika the Earthquake Investigation Committee slowly replaced with National Earthquake Research Center which today works under the Ministry of Education, Research of Development of Nakama.