A series of discontinuous plateaus lies south of the volcanic belt and reaches an elevation of about 1,000 feet (300 metres). The highest volcano is Mount Semeru, at 12,060 feet (3,676 metres). In the west the volcanic peaks are clustered together, becoming more widely spaced in the central and eastern parts of the island. Java is highly volcanic, yet serious eruptions are few only 35 of its 112 volcanoes are active. A longitudinal mountain chain, surmounted by many volcanoes, runs east to west along the island’s spine and is flanked by limestone ridges and lowlands. Java is 661 miles (1,064 km) long from east to west and ranges in width from about 60 miles (100 km) at its centre to more than 100 miles (160 km) near each end.

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Java sumatra