Based on coil observations in Tanah Baru, Depok, lightning strikes about 15 times a minute. Similar findings also occurred in Sawangan. Regarding this incident, a lightning expert from the Bandung Institute of Technology (ITB), Syarif Hidayat, revealed that this phenomenon is actually quite common.
“It is caused by a phenomenon called orography. So in an area where there is a high mountain and nearby there is a bay, that's generally a lot of lightning. Why? Because every day the mountain is constantly exposed to sunlight, it becomes warm. Warm air rises, the void is filled by moist air from the direction of the bay."
This then produces what are called cumulonimbus clouds, which are clouds that form due to the vertical movement of air. Cumulonimbus clouds dominate the southern area of Jakarta, Depok, to Bogor. As a result, this area often experiences lightning with high frequency throughout the year. Syarif's statement is in line with research conducted in 2002 by a lightning expert as well as a researcher from the Laboratory of High Current and High Voltage, Department of Electrical Engineering, Faculty of Industrial Engineering, ITB, Dr. Ir. Dip Ing Reynaldo Zoro, who said that Depok was the area with the largest lightning in the world.
In his research, Zoro received a negative lightning current of 379.2 kA (kilo Ampere) and a positive lightning current of 441.1 kA. He especially found the large lightning current in the area in the western part of Depok. With such a strong current, lightning can crack buildings made of concrete.
Talking about lightning, Indonesia turned out to be a country that has the fiercest lightning. You may even believe it or not, the lightning that occurred in Depok City, West Java, has the largest electric current in the world," - Dr. Ir. Dip Ing Reynaldo Zoro - Similar to Syarif's explanation, Zoro said that the electric current from lightning in Depok was much higher because it was influenced by winds from valleys and mountains from Bukit Barisan, as well as local winds from land and sea in the Riau Islands and Malak Strait. Another reason is because the iron content in Depok soil is quite high.
Syarif's statement is in line with research conducted in 2002 by a lightning expert as well as a researcher from the Laboratory of High Current and High Voltage, Department of Electrical Engineering, Faculty of Industrial Engineering, ITB, Dr. Ir. Dip Ing Reynaldo Zoro, who said that Depok was the area with the largest lightning in the world.
In his research, Zoro received a negative lightning current of 379.2 kA (kilo Ampere) and a positive lightning current of 441.1 kA. He especially found the large lightning current in the area in the western part of Depok. With such a strong current, lightning can crack buildings made of concrete.
Talking about lightning, Indonesia turned out to be a country that has the fiercest lightning. You may even believe it or not, the lightning that occurred in Depok City, West Java, has the largest electric current in the world," - Dr. Ir. Dip Ing Reynaldo Zoro - Similar to Syarif's explanation, Zoro said that the electric current from lightning in Depok was much higher because it was influenced by winds from valleys and mountains from Bukit Barisan, as well as local winds from land and sea in the Riau Islands and Malak Strait.
Another reason is because the iron content in Depok soil is quite high.
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