top＞Others・Ooita・Japanese＞The torture of Blood Pond and tornado hell
The torture of Blood Pond and tornado hell are introduced the tour around the Beppu hell, and here.
Although both the torture of Blood Pond and tornado hell are Beppu Hot Spring hell, it is in the place which separated a few from the Kannawa hot spring resort, and a car is useful to move. As for the torture of Blood Pond, it is the feature that the pond side has colored in vermilion as the name suggests. Iron oxide, magnesium oxide, etc. which the underground substance oxidized automatically and were made with heat serve as mud of heat, a pond is covered with the color of this red pond, and it looks red. It seems that that existence was known more from ancient times as this torture of Blood Pond appears in Bungo regional chronicle of the Nara period by Akayu spring and has appeared also in the Manyo-Syu under the name of Akaike. It is said that it will be dyed such a crimson color if the mud of underground heat is gushing from the gush mouth by natural power and appears in surface of the earth. It is said that it is merely shown this hell and that underground magma is actually working still, and explosion is actually started from the pond of blood these days in Showa 2. It seems that inside pressure will increase and explosion will occur if the mud of heat accumulates and a gush mouth is closed. It is said that acidity PH incidentally serves as a certain acid hot water about 2.5 in the pond of this blood, and water temperature has become 78 degrees. The water which is so-called one of the geysers, and was underground heated by magma pressures upwards tornado hell. This tornado hell is specified as the natural treasure of Beppu. It seems that the water underground heated to 150 degrees blows off at a stretch with a rise of pressure, and height is reached to about 50m. Since it is divided into the roof here now, it is not like [ which feels force so much ], but a natural mystery is felt for the boiling water still pressured upwards almost regularly at intervals of about 35 minutes - 40 minutes at hand. The time which has spouted hot water is about for 5 minutes. If water with the hot degree of high fever goes up from the deep place of underground, a cave is covered and the temperature of the hot water of a cave exceeds a boiling point, the structure of the geyser of tornado hell will cause an evaporation phenomenon, and will blow off on the surface of the earth at a stretch. If the pressure of an underground cave falls, having repeated this cycle that vigor declines and is calmed down gradually in every 35 minutes will also be able to call the hot water which was blowing off until now the structure of tornado [ here ] hell. Moreover, it is said that the shortness of the jet time of a geyser is the feature of the tornado hell in here Beppu even if it sees globally.