Home Grobogan Bledug Kuwu
it is a geological phenomenon where a vast open area has small continuous explosions containing carbon dioxide and salty water. The local people collected the water coming along with the explosions and dry it under the sun which then turns the water into salt.
As Java is completly volcanic islan, the scientific explanation says that Bledug Kuwu in fact is a mud volcano, when viewed from a distance, there are seen to rise from it large volumes of vapour, like the spray from the billows dashing against a rocky shore, and there is heard a loud noise like distant thunder. On a nearer approach, the source of these phenomena is seen to be a hemispherical mound of black earth mixed with water, about sixteen feet in diameter, and which at intervals of a few seconds is pushed upwards by a force acting from beneath to a height of between twenty and thirty feet. It then suddenly explodes with a loud noise, scattering in every direction a quantity of black mud, which has a strong pungent smell resembling that of coal-tar, and is considerably warmer than the air. With the mud thus thrown out there has been formed around the mound a large perfectly level and nearly circular plain, about half a mile in circumference. The water mixed with the mud is salt, and the salt is separated from it by evaporation for economical purposes.
During the rainy season the action of this mud volcano becomes more violent, the explosions are louder, and the mud is thrown to a greater height.