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Seismicity In Japan
This is a list of earthquakes in Japan 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 furthermore reliable and precise magnitude data is scarce for earthquakes that occurred before the development of modern measuring instruments. History Although there is mention of an earthquake in Yamato in what is now Nara Prefecture on August 23, 416, the first earthquake to be reliably documented took place in Nara prefecture on May 28, 599 during the reign of Empress Suiko, destroying buildings throughout Yamato province.Hammer, Joshua. (2006). ''Yokohama Burning: The Deadly 1923 Earthquake and Fire that Helped Forge the Path to World War II,'' p. 62–63.Ishibashi, K. (2004);Status of historical seismolog ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Road
A road is a linear way for the conveyance of traffic that mostly has an improved surface for use by vehicles (motorized and non-motorized) and pedestrians. Unlike streets, the main function of roads is transportation. There are many types of roads, including parkways, avenues, controlled-access highways (freeways, motorways, and expressways), tollways, interstates, highways, thoroughfares, and local roads. The primary features of roads include lanes, sidewalks (pavement), roadways (carriageways), medians, shoulders, verges, bike paths (cycle paths), and shared-use paths. Definitions Historically many roads were simply recognizable routes without any formal construction or some maintenance. The Organization for Economic Co-operation and Development (OECD) defines a road as "a line of communication (travelled way) using a stabilized base other than rails or air strips open to public traffic, primarily for the use of road motor vehicles running on their own wheels", whic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tsunami
A tsunami ( ; from ja, 津波, lit=harbour wave, ) 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. Unlike normal ocean waves, which are generated by wind, or tides, which are in turn generated by the gravitational pull of the Moon and the Sun, a tsunami is generated by the displacement of water from a large event. Tsunami waves do not resemble normal undersea currents or sea waves because their wavelength is far longer. Rather than appearing as a breaking wave, a tsunami may instead initially resemble a rapidly rising tide. For this reason, it is often referred to as a tidal wave, although this usage is not favoured by the scientific community because it might give ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kamakura, Kanagawa
is a city in Kanagawa Prefecture, Japan. Kamakura has an estimated population of 172,929 (1 September 2020) and a population density of 4,359 persons per km² over the total area of . Kamakura was designated as a city on 3 November 1939. Kamakura was the ''de facto'' capital of Japan from 1185 to 1333 as the seat of the Kamakura Shogunate, and became the nation's most populous settlement during the Kamakura period. Kamakura is a popular domestic tourist destination in Japan as a coastal city with a high number of seasonal festivals, as well as ancient Buddhist and Shinto shrines and temples. Geography Surrounded to the north, east, and west by hills and to the south by the open water of Sagami Bay, Kamakura is a natural fortress. Before the construction of several tunnels and modern roads that now connect it to Fujisawa, Ofuna ( ja) and Zushi, on land it could be entered only through narrow artificial passes, among which the seven most important were called , a name some ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1293 Kamakura Earthquake
The 1293 Kamakura earthquake in Japan occurred at about 06:00 local time on 27 May 1293. It had an estimated magnitude of 7.1–7.5 and triggered a tsunami. The estimated death toll was 23,024. It occurred during the Kamakura period, and the city of Kamakura was seriously damaged. In the confusion following the quake, Hōjō Sadatoki, the Shikken of the Kamakura shogunate, carried out a purge against his subordinate Taira no Yoritsuna. In what is referred to as the Heizen Gate Incident, Yoritsuna and 90 of his followers were killed. It has been suggested that the reference to a large tsunami may be incorrect, although a tsunami deposit has been found that is consistent with this age. See also * List of earthquakes in Japan * List of historical earthquakes References 1293 Kamakura earthquake The 1293 Kamakura earthquake in Japan occurred at about 06:00 local time on 27 May 1293. It had an estimated magnitude of 7.1–7.5 and triggered a tsunami. The estimate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
869 Sanriku Earthquake
__NOTOC__ Year 869 ( DCCCLXIX) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar. Events By place Byzantine Empire * Summer – Emperor Basil I allies with the Frankish emperor Louis II against the Saracens. He sends a Byzantine fleet of 400 ships (according to the ''Annales Bertiniani''), under the command of Admiral Niketas Ooryphas, to support Louis (who is besieging the city port of Bari) and to clear the Adriatic Sea of Muslim raiders. * The Hagia Sophia Basilica (church) in Constantinople suffers great damage during an earthquake, which makes the eastern half-dome collapse. Basil I orders it to be repaired. Europe * August 8 – Lothair II, King of Middle Francia (Lotharingia), dies at Piacenza, on his way home from meeting Pope Adrian II at Rome, to get assent for a divorce. Lotharingia is subsequently divided between Lothair's uncles, Charles the Bald of France and Louis the German. Britain * The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Minoh, Osaka
is a city in northwestern Osaka Prefecture, Japan. Its name is commonly romanized as "Minō" or "Minoo"; however, the city government officially uses the spelling Minoh in English. As of October 2016, the city has an estimated population of 134,435 and a population density of 2,800 persons per km². Its total area is . History The city was incorporated on 1 December 1956. Mister Donut opened its first Japanese shop in Minoh in 1971. Geography Minoh lies about north of the center of the city of Osaka. It is accessed by the Hankyu Railway in about 30 minutes from Umeda Station. Minoh is best known for Meiji no Mori Minō Quasi-National Park, one of Japan's oldest national parks, which is home to a large population of wild monkeys and has a picturesque waterfall. The 1200-year-old Buddhist temple Katsuō-ji, famous for its huge collection of Daruma dolls is located in Minoh. Neighboring municipalities *Osaka Prefecture ** Ibaraki ** Ikeda ** Suita ** Toyonaka ** Toyono *H ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
684 Hakuho Earthquake
__NOTOC__ Year 684 ( DCLXXXIV) was a leap year starting on Friday (link will display the full calendar) of the Julian calendar. The denomination 684 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. Events By place Europe * Ghislemar, mayor of the palace in Neustria and Burgundy, dies after a 2-year reign, and is succeeded by his father Waratton. He makes peace between the three Frankish kingdoms. Britain * King Ecgfrith of Northumbria sends a punitive expedition to Ireland under his ealdorman Berht, laying waste to the territory of Meath, ruled by High King Fínsnechta Fledach. Arabian Empire * Caliph Muawiya II dies at Damascus, after a brief reign that ends Sufyanid rule. A new caliph is proclaimed in Syria amidst tribal wars, but Marwan I will reign until next year. * August 18 – Battle of Marj Rahit: Muslim partisans under Marwan I defeat the suppor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Julian Calendar
The Julian calendar, proposed by Roman consul Julius Caesar in 46 BC, was a reform of the Roman calendar. It took effect on , by edict. It was designed with the aid of Greek mathematicians and astronomers such as Sosigenes of Alexandria. The calendar became the predominant calendar in the Roman Empire and subsequently most of the Western world for more than 1,600 years until 1582, when Pope Gregory XIII promulgated a minor modification to reduce the average length of the year from 365.25 days to 365.2425 days and thus corrected the Julian calendar's drift against the solar year. Worldwide adoption of this revised calendar, which became known as the Gregorian calendar, took place over the subsequent centuries, first in Catholic countries and subsequently in Protestant countries of the Western Christian world. The Julian calendar is still used in parts of the Eastern Orthodox Church and in parts of Oriental Orthodoxy as well as by the Berbers. The Julian calenda ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gregorian Calendar
The Gregorian calendar is the calendar used in most parts of the world. It was introduced in October 1582 by Pope Gregory XIII as a modification of, and replacement for, the Julian calendar. The principal change was to space leap years differently so as to make the average calendar year 365.2425 days long, more closely approximating the 365.2422-day 'tropical' or 'solar' year that is determined by the Earth's revolution around the Sun. The rule for leap years is: There were two reasons to establish the Gregorian calendar. First, the Julian calendar assumed incorrectly that the average solar year is exactly 365.25 days long, an overestimate of a little under one day per century, and thus has a leap year every four years without exception. The Gregorian reform shortened the average (calendar) year by 0.0075 days to stop the drift of the calendar with respect to the equinoxes.See Wikisource English translation of the (Latin) 1582 papal bull '' Inter gravissimas''. Second, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Epicenter
The epicenter, epicentre () or epicentrum in seismology is the point on the Earth's surface directly above a hypocenter or focus, the point where an earthquake or an underground explosion originates. Surface damage Before the instrumental period of earthquake observation, the epicenter was thought to be the location where the greatest damage occurred, but the subsurface fault rupture may be long and spread surface damage across the entire rupture zone. As an example, in the magnitude 7.9 Denali earthquake of 2002 in Alaska, the epicenter was at the western end of the rupture, but the greatest damage was about away at the eastern end. Focal depths of earthquakes occurring in continental crust mostly range from . Continental earthquakes below are rare whereas in subduction zone earthquakes can originate at depths deeper than . Epicentral distance During an earthquake, seismic waves propagate in all directions from the hypocenter. Seismic shadowing occurs on the opposite s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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