跳到主要內容

Mega earthquake in Japan

NHK



31 Jan 2025

A Japanese government panel says an anticipated megaquake in the Nankai Trough along Japan's Pacific Coast could kill up to 298,000 people -- down slightly from an estimate made more than a decade ago.

There is said to be a roughly 80 percent chance that a magnitude 8 to 9 quake will occur along the trough within the next 30 years.

Nagoya University Professor Emeritus Fukuwa Nobuo submitted the panel's report to Disaster Management Minister Sakai Manabu.

Sakai expressed his belief that damage can be reduced if measures are implemented and action is taken based on plans. He said the government will do what it can to promote the measures.

The report says the quake's maximum magnitude will be on the range of nine. Seismic intensity is expected to be at least lower 6 on Japan's scale of zero to 7 in 24 prefectures, and 7 in 10 other prefectures.

The panel estimates tsunami at least 10 meters high could reach Tokyo and 12 other prefectures between the Kanto and Kyushu regions. It also says tsunami more than 30 meters high could strike parts of two prefectures -- Kochi and Shizuoka.

The panel predicts the death toll would be 298,000 in the worst-case scenario of the quake hitting late at night in winter. Most of the fatalities are expected to be caused by tsunami.

The figure is only about 8 percent lower than the previous estimate of 320,000, even though measures have been taken to enable people to evacuate more quickly. These include building seawalls and setting up evacuation towers.

The panel says the fatalities will be sharply lower if more steps are taken.

The panel estimates up to 52,000 people could die from disaster-related causes -- about 13 times the figure for the 2011 quake and tsunami in northeastern Japan. This highlights the need to improve evacuees' living conditions.


Seafloor Tsunami detectors : SNet, DoNet, N-Net:



Fukuwa says people think Japan will be in great danger unless damage from the anticipated megaquake can be reduced, and he hopes measures will be thoroughly implemented.

Asahi shinbun

Asahi news

Tohoku earthquake in 2011

Seismic hazard map

留言

這個網誌中的熱門文章

CMOS sensor trends and astrophotography, from amateur astronomers perspective

Nowadays, even in low light conditions, digital camera can quality pictures with higher ISO, noise and hot pixels have been gradually reduced. Sony has introduced back illumination process for consumer market. Sony BSI sensors evolved  from Exmor to now Exmor RS( stacked) technology. This stacked technology allows further chip size reduction, which has strong demands in smartphone camera market. Digital astrophotography is also benefited from such advances, utilising Back Side Illumination technology Exmor: Within the CMOS sensor, it outputs low-noise digital signals by "on-chip column AD conversion" and "dual noise reduction" to suppress noise in the first half of the process In low light conditions, when a wide aperture is desirable to collect as much light as possible. At apertures wider than f/2.0, back-illuminated Exmor R sensors are significantly more efficient at collecting light than conventional, front-illuminated sensor...

ultrafast rendezvous to ISS

    14 Oct 2020,  being the first to use a new “ultrafast” rendezvous” scheme with the ISS. Following a flawless ascent to the correct orbit, Soyuz 2 .1a , Soyuz MS-17 caught up with the orbiting laboratory in only two orbits (three hours), halving the time it takes for crew to get to the Station.   The three space travelers of the Soyuz MS-17 mission launched on a six-month mission the International Space Station.  previous 3/4 orbit rendezvous: Soyuz MS-16 4 orbit rendezvous A three-orbit profile was deemed possible without major flight design changes after inauguration of the Soyuz 2-1A rocket that provides a much higher orbit injection accuracy than its predecessors and would allow the two correction maneuvers on Orbit #2 to be eliminated while the Automated Rendezvous Phase would still remain untouched. The deletion of the Orbit #2 maneuvers was expected to slightly tighten the already restrictive phase angle window from and upper limit of 30-35° to 25-28°...

Scythians 斯泰基 塞種 西古提人

900 BC - 200 AD British museum   Tomb of scythe prince, Buktarma valley, 1200 masl, Google map Herodotus   絲路上的帝國 Biblegeography   哥羅西書 3:11  在此並不分希利尼人、猶太人、受割禮的、未受割禮的、化外人、 西古提人 、為奴的、自主的.惟有基督是包括一切、又住在各人之內。 塞種 塞迦  saka 史記漢書 西域傳: 塞種  ctext 昔匈奴破大月氏,大月氏西君大夏,而塞王南君罽賓。塞種分散,往往為數國。自疏勒以西北,休循、捐毒之屬,皆故 塞種 也。 匈奴列傳 Ctext :塞王 《史記》在《大宛列傳》與《匈奴列傳》中, 詳細 記錄了中亞至天山一帶的塞種(塞王、塞地)狀況。例如,文中記載了月氏西破走塞王,導致塞人南遷越過懸度(今帕米爾高原及克什米爾一帶) Baike Genetic history   Genetics  Nih griffin  ? Scytho-Siberian  world 塞迦 saka  wiki Disappeared? Sarmatians ( 薩爾馬泰 , 奄蔡 史記 ,  Aorsi )and goths YouTube