USS Sterlet (SS-392) to the Navy on 31 January 1969 when she was sunk as a target by the nuclear-powered submarine USS . "Sterlet" was awarded six battle stars for World War II service. USS Sterlet (SS-392) USS "Sterlet" (SS-392), a "Balao"-class submarine, was the only ship of the United States Navy to be named for the sterlet, a small sturgeon found in the Caspian Sea and its rivers, whose meat is considered delicious and whose eggs are one of the world's great delicacies, caviar. Her keel was laid down on 14 July 1943 at the Portsmouth Navy Yard. She was launched on
Types of volcanic eruptions Types of volcanic eruptions Several types of volcanic eruptions—during which lava, tephra (ash, lapilli, volcanic bombs and volcanic blocks), and assorted gases are expelled from a volcanic vent or fissure—have been distinguished by volcanologists. These are often named after famous volcanoes where that type of behavior has been observed. Some volcanoes may exhibit only one characteristic type of eruption during a period of activity, while others may display an entire sequence of types all in one eruptive series. There are three different types of eruptions. The most well-observed are magmatic eruptions, which involve the decompression of gas within magma that