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1707 Hōei Earthquake
The struck south-central Japan at around 13:45 local time on 28 October. It was the largest earthquake in Japanese history until it was surpassed by the 2011 Tōhoku earthquake. It caused moderate-to-severe damage throughout southwestern Honshu, Shikoku and southeastern Kyūshū. The earthquake, and the resulting destructive tsunami, caused more than 5,000 casualties. This event ruptured all of the segments of the Nankai megathrust simultaneously, the only earthquake known to have done this, with an estimated magnitude of 8.6 or 8.7 . It possibly also triggered the last eruption of Mount Fuji 49 days later. Tectonic setting The southern coast of Honshu runs parallel to the Nankai Trough, which marks the subduction of the Philippine Sea plate beneath the Eurasian plate. Movement on this convergent plate boundary leads to many earthquakes, some of them of megathrust type. The Nankai megathrust has five distinct segments (A-E) that can rupture independently. The segments ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japan Standard Time
, or , is the standard time zone in Japan, 9 hours ahead of UTC (UTC+09:00). Japan does not observe daylight saving time, though its introduction has been debated on several occasions. During World War II, the time zone was often referred to as Tokyo Standard Time. Japan Standard Time is equivalent to Time in South Korea, Korean Standard Time, Time in North Korea, Pyongyang Time (North Korea), Time in Indonesia, Eastern Indonesia Standard Time, Time in East Timor, East-Timorese Standard Time, Time in Palau, Palau Time, and Yakutsk Time (Russia). History Before the Meiji (era), Meiji era (1868–1912), each local region had its own time zone in which noon was when the sun was exactly at its culmination. As modern transportation methods, such as trains, were adopted, this practice became a source of confusion. For example, there is a difference of about 5 degrees longitude between Tokyo and Osaka and because of this, a train that departed from Tokyo would arrive at Osaka 20 minu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jeju Province
Jeju Province (; ), officially Jeju Special Self-Governing Province (Jeju language, Jeju: ; ), is the southernmost Provinces of South Korea, province of South Korea, consisting of eight inhabited and 55 uninhabited islands, including Marado, Udo (island), Udo, the Chuja Islands, Chuja Archipelago, and the country's largest island, Jeju Island.formerly transliterated as Cheju Island or Cheju Do, the island was also previously known as Quelpart to Europeans and as Saishū during the Korea under Japanese rule, Japanese occupation of Korea. The province is located in the Korea Strait, with the Korea, Korean Peninsula to the northwest, Japan to the east, and China to the west. The province has two cities: the capital Jeju City, on the northern half of the island, and Seogwipo, on the southern half of the island. The island is home to the shield volcano Hallasan, the highest point in South Korea. Jeju language, Jeju and Korean language, Korean are the official languages of the province, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nagasaki
, officially , is the capital and the largest Cities of Japan, city of Nagasaki Prefecture on the island of Kyushu in Japan. Founded by the Portuguese, the port of Portuguese_Nagasaki, Nagasaki became the sole Nanban trade, port used for trade with the Portuguese and Dutch during the 16th through 19th centuries. The Hidden Christian Sites in the Nagasaki Region have been recognized and included in the World Heritage Sites in Japan, UNESCO World Heritage Sites list. Part of Nagasaki was home to a major Imperial Japanese Navy base during the First Sino-Japanese War and Russo-Japanese War. Near the end of World War II, the American atomic bombings of Hiroshima and Nagasaki made Nagasaki the second city in the world to experience a nuclear attack. The city was rebuilt. , Nagasaki has an estimated population of 392,281, and a population density of 966 people per km2. The total area is . History Nagasaki as a Jesuit port of call The first recorded contact between Portuguese e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kawachi Province
was a Provinces of Japan, province of Japan in the eastern part of modern Osaka Prefecture. It originally held the southwestern area that was split off into Izumi Province. It was also known as . Geography The area was radically different in the past, with Kawachi Bay and lake dominating the area over what is now land. That the became the plains in the west of the province was in part due to the sediment flowing from the Yodo River, Yodo and Yamato Rivers. ''Chiku'' Kawachi was divided into three : , , and . * The northern county comprised the modern Hirakata, Osaka, Hirakata, Neyagawa, Osaka, Neyagawa, Kadoma, Osaka, Kadoma, Moriguchi, Osaka, Moriguchi, Shijōnawate, Osaka, Shijōnawate, Daitō, Osaka, Daitō, and Katano, Osaka, Katano, Osaka Prefecture, Osaka areas. * The central county comprised the modern Higashiōsaka, Osaka, Higashiōsaka, Yao, Osaka, Yao, and Kashiwara, Osaka, Kashiwara, Osaka areas. * The southern county comprised the modern Sakai, Osaka, Sakai's eastern ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japan Meteorological Agency Seismic Intensity Scale
The Japan Meteorological Agency (JMA) Seismic Intensity Scale (known in Japan as the Shindo seismic scale) is a seismic intensity scale used in Japan to categorize the intensity of local ground shaking caused by earthquakes. The JMA intensity scale differs from magnitude measurements like the moment magnitude () and the earlier Richter scales, which represent how much energy an earthquake releases. Similar to the Mercalli scale, the JMA scale measures the intensities of ground shaking ''at various observation points within the affected area''. Intensities are expressed as numerical values called ; the higher the value, the more intense the shaking. Values are derived from ground acceleration and duration of the shaking, which are themselves influenced by factors such as distance to and depth of the hypocenter (focus), local soil conditions, and nature of the geology in between, as well as the event's magnitude; every quake thus entails numerous intensities. Intensity data ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kōchi Prefecture
is a prefecture of Japan located on the island of Shikoku. Kōchi Prefecture has a population of 669,516 (1 April 2023) and has a geographic area of 7,103 km2 (2,742 sq mi). Kōchi Prefecture borders Ehime Prefecture to the northwest and Tokushima Prefecture to the northeast. Kōchi is the capital and largest city of Kōchi Prefecture, with other major cities including Nankoku, Shimanto, and Kōnan. Kōchi Prefecture is located on Japan's Pacific coast surrounding a large bay in the south of Shikoku, with the southernmost point of the island located at Cape Ashizuri in Tosashimizu. Kōchi Prefecture is home to Kōchi Castle, considered the most intact Japanese castle, and the Shimanto River, one of the few undammed rivers in Japan. History Antiquity Before the Ritsuryō System In the Kujiki, first recorded governments in Kōchi Prefecture were Hata (in the west) and Tosa (in the center). Hata was established first, so it is thought that it had more influen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1854 Nankai Earthquake
The 1854 Nankai earthquake occurred at about 16:00 local time on 24 December. It had a magnitude of 8.4 and caused a damaging tsunami. More than 30,000 buildings were destroyed and there were at least 3,000 casualties. It was the second of the three Ansei great earthquakes; the 1854 Tōkai earthquake of identical magnitude had hit northeast the previous morning, and the third 1855 Edo earthquake would strike less than a year later. Background The southern coast of Honshu runs parallel to the Nankai Trough, which marks the subduction of the Philippine Sea plate beneath the Eurasian plate. Movement on this convergent plate boundary leads to many earthquakes, some of them of the megathrust type. The Nankai megathrust has five distinct segments (A–E) that can rupture independently, the segments have ruptured either singly or together repeatedly over the last 1300 years. Megathrust earthquakes on this structure tend to occur in pairs, with a relatively short time gap between ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1854 Tōkai Earthquake
The 1854 Tōkai earthquake was the first of the Ansei great earthquakes (1854–1855). It occurred at about 09:00 local time on 23 December 1854. It had a magnitude of 8.4 and caused a damaging tsunami. More than 10,000 buildings were destroyed and there were at least 2,000 casualties. It was the first of the three Ansei great earthquakes; the 1854 Ansei-Nankai earthquake of similar size hit southern Honshu the following day. Background The southern coast of Honshu runs parallel to the Nankai Trough, which marks the subduction of the Philippine Sea plate beneath the Eurasian plate. Movement on this convergent plate boundary leads to many earthquakes, some of them of megathrust type. The Nankai megathrust has five distinct segments (A-E) that can rupture independently, the segments have ruptured either singly or together repeatedly over the last 1300 years. Megathrust earthquakes on this structure tend to occur in pairs, with a relatively short time gap between them. In addi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Soil Liquefaction
Soil liquefaction occurs when a cohesionless saturated or partially saturated soil substantially loses Shear strength (soil), strength and stiffness in response to an applied Shear stress, stress such as shaking during an earthquake or other sudden change in stress condition, in which material that is ordinarily a solid behaves like a liquid. In soil mechanics, the term "liquefied" was first used by Allen Hazen in reference to the 1918 failure of the Calaveras Dam in California. He described the mechanism of flow liquefaction of the embankment dam as: The phenomenon is most often observed in saturated, loose (low density or uncompacted), sandy soils. This is because a loose sand has a tendency to Compressibility, compress when a force, load is applied. Dense sands, by contrast, tend to expand in volume or 'Reynolds' dilatancy, dilate'. If the soil is saturated by water, a condition that often exists when the soil is below the water table or sea level, then water fills the gap ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nara Prefecture
is a Prefectures of Japan, prefecture of Japan located in the Kansai region of Honshu. Nara Prefecture has a population of 1,321,805 and has a geographic area of . Nara Prefecture borders Kyoto Prefecture to the north, Osaka Prefecture to the northwest, Wakayama Prefecture to the southwest, and Mie Prefecture to the east. Nara (city), Nara is the capital and largest city of Nara Prefecture, with other major cities including Kashihara, Nara, Kashihara, Ikoma, Nara, Ikoma, and Yamatokōriyama. Nara Prefecture is located in the center of the Kii Peninsula on Japan's Pacific Ocean coast, and is one of only eight landlocked prefectures. Nara Prefecture has the distinction of having more UNESCO World Heritage listings than any other prefecture in Japan. History The Nara Prefecture region is considered one of the oldest regions in Japan, having been in existence for thousands of years, and is widely viewed as the Japanese cradle of civilization. Like Kyoto, Nara was one of Imperial ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shizuoka Prefecture
is a Prefectures of Japan, prefecture of Japan located in the Chūbu region of Honshu. Shizuoka Prefecture has a population of 3,555,818 and has a geographic area of . Shizuoka Prefecture borders Kanagawa Prefecture to the east, Yamanashi Prefecture to the northeast, Nagano Prefecture to the north, and Aichi Prefecture to the west. Shizuoka (city), Shizuoka is the capital and Hamamatsu is the largest city in Shizuoka Prefecture, with other major cities including Fuji, Shizuoka, Fuji, Numazu, and Iwata, Shizuoka, Iwata. Shizuoka Prefecture is located on Japan's Pacific Ocean coast and features Suruga Bay formed by the Izu Peninsula, and Lake Hamana which is considered to be one of Japan's largest lakes. Mount Fuji, the tallest volcano in Japan and cultural icon of the country, is partially located in Shizuoka Prefecture on the border with Yamanashi Prefecture. Shizuoka Prefecture has a significant Motor vehicle, motoring heritage as the founding location of Honda, Suzuki Motor C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
