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Which islands make up the two main chains of the Solomon Islands?

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The Solomon Islands consist of two parallel chains that run northwest-southeast and converge on San Cristobal (Makira Island). The islands are categorized as follows:

Southern Chain: Includes Vella Lavella, the New Georgia Islands, Savo, and Guadalcanal.1
Northern Chain: Includes Choiseul, Santa Isabel, and Malaita.1

Additionally, the nation includes the Santa Cruz Islands, a group of smaller islands located approximately 345 miles east of Guadalcanal.1