A tiltmeter on Mauna Loa, used to predict eruptions by measuring very small changes in the profile of the mountain. A tiltmeter is a sensitive inclinometer designed to measure very small changes from the vertical level, either on the ground or in structures.
Mr. Billion - 1977: Filming was done at the Sonoma-Marin Fairgrounds and the Petaluma Speedway. Cujo - 1983: Stephen King's horror flick about a rabies infested St. Bernard featured the Scott Ranch Hills off of Corona Rd. Explorers - 1985: A very young Ethan Hawke and River Phoenix starred in this absurd SciFi movie.
The movie was filmed in Winnetka, Illinois, O'Hare International Airport in Chicago, Miami, and New York City (which was star Culkin's hometown at the time). The exterior of Duncan's Toy Chest in New York City was filmed outside of the Rookery Building in downtown Chicago.