Table schema:
CREATE TABLE table_name_51 (eruptions VARCHAR, country VARCHAR, location VARCHAR, volcanic_explosivity_index VARCHAR)

Question: Which Eruptions have a Location of pacific ring of fire, and a Volcanic Explosivity Index of 6, and a Country of peru?
SQL: SELECT eruptions FROM table_name_51 WHERE location = "pacific ring of fire" AND volcanic_explosivity_index = "6" AND country = "peru"