Anonymous ID: 6d047c Nov. 17, 2018, 8:49 p.m. No.3947006   🗄️.is 🔗kun

>>3946340

>>3946848

 

FIRE WHIRLS (TORNADOES)

 

Around noon on 1 September 1923, a magnitude 7.9 earthquake (known as the great Kanto earthquake, named for the region that includes Tokyo) hit the downtown Tokyo area.

 

Many large fires were quickly ignited in collapsed houses by small lunchtime kitchen fires. These fires quickly spread and created several large mass fires [1]. To escape from the fire threat, evacuees gathered in the Hifukusho-ato area, where an old military-clothing factory had been demolished a few years earlier, leaving an open area of 70; 000 m2 without any structures or trees (see Fig. 1a). Because many evacuees thought that this open space was large enough to be safe from the fire threat, Hifukusho-ato was packed with 40,000 people.

An unexpected disaster, however, struck under fine weather conditions with a south wind of speed 4–5 m=s. Fire whirls suddenly appeared in the crowded Hifukusho-ato space, carrying flame and burning debris as they swept through the area (see Fig. 1b). These fire whirls moved around the Hifukusho-ato area, causing an estimated 38,000 deaths within a period of 15 min [1,2].