The disaster study expert of UGM Dr Sudibyakto on Monday (10/11) said that the thunder storm in UGM has a wind speed of 70 to 80 km/hours and it was local. However, there’s a possibility that the disaster will happen within the next 3 months.
According to the lecturer in Geography Faculty of UGM, the gale was caused by the low pression in UGM. The difference in air pressure and heat level in UGM campus and other locations made UGM as the center of low air pressure. The difference in heat level can be caused by many numbers of damaged areas in the cities and the lack of green area. The heat level difference was 2 to 3 Celsius degree.
Sudibyakto also added that there are other factors that might contributed to the storm, which is the presence of Inter Tropical Convergence Zone (ITCZ). This zone always follows the sun circulation. In November and December, the sun is at the southern part of the earth, which means that the earth is receiving a pretty large amount of sun’s radiation. This Radiation will heighten the heat level, and this can lead to the low air pressure condition.
Sudibyakto added that within the next three months the possibility of thunder storms and storms caused by the tropical storm from Australia is pretty high. Potential areas that will suffer from floods are the northern area of Java, which includes Brebes, Tegal, Kendal, Semarang, Bali and Nusa Tenggara.
Meanwhile, potential areas that will suffer thunder storm are the hills area. In Yogyakarta, those are Gunung Kidul, Kulon Progo, Gunung Merapi, Klaten and Boyolali.
(Public Relations of UGM/Gusti Grehenson)