Bí-kok Tē-chit Tiāu-cha-só͘

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Bí-kok Tē-chit Tiāu-cha-só͘ (United States Geological Survey USGS) sī Bí-kok chèng-hú ê kho-ha̍k pō͘-bûn chi it, choan-bûn gián-kiù Bí-kok thó͘-tē pau-koat seng-thàu, tē-lí, tē-chit, chúi-lī téng hong-bīn.

Pún só͘ bô hêng-chèng koán-lí siōng ê sū-bū, kaⁿ-taⁿ sī tan-sûn ê gián-kiù ki-koan.