|The Solomon Islands form an archipelago in the Southwest Pacific about 1,900 kilometers (1,200 mi.) northeast of Australia. The terrain of the Solomon Islands ranges from ruggedly mountainous islands to low-lying coral atolls, the Solomons stretch in a 1,450-kilometer (900 mi.) chain southeast from Papua New Guinea across the Coral Sea to Vanuatu. The main islands of Choiseul, New Georgia, Santa Isabel, Guadalcanal, Malaita, and
Makira have rainforested mountain ranges of mainly volcanic origin, deep narrow valleys, and coastal belts lined with coconut palms and ringed by reefs. The smaller islands are atolls and raised coral reefs, often spectacularly beautiful. The Solomon Islands region is geologically active, and earth tremors are frequent.