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Karimunjawa, Indonesia Overview

Karimunjava or Karimun Java is an archipelago of 27 islands in the Java Sea, Indonesia, approximately 80 kilometres northwest of Jepara. The islands’ name means ‘a stone’s throw from Java’ in Javanese. They have a total land area of 78 km. The main island is known as Karimun (2,700 ha), while the second-largest island is Kemujan (1,400 ha). The population is largely Javanese, with pockets of Bugis and Madurese inhabitants. Javanese culture is dominant in the islands which are the only islands off Java where Javanese is the lingua franca.

The archipelago consists predominantly of pre-Tertiary continental islands primarily of quartzites and shales covered by basaltic lava. Geologically, the islands are part of Sundaland.[1] The islands have extensive fringing and patchy reefs coral reefs.

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Detailed Map of Karimunjawa, Indonesia

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The best time to visit the islands is during the dry season, generally from April to October. The islands are influenced by the northwest monsoon during which winds from the west-northwest predominate and ocean currents are in an easterly direction. During the monsoon, rainfall averages 40 mm/day. During the southeast monsoon, dry winds from the east-southeast predominate and the ocean currents are in a westerly direction bringing water masses from the Flores Sea. Upwelled water masses during the southeast monsoon from the Flores and Banda Seas provides lower sea surface temperatures than during the northeast monsoon. The shallow slopes (5° to 15°) of the island shelves in the Java Sea (which rarely exceeds a depth of 55 m), provide environments for extensive reef development.