although the summit of underwater volcanoLoihi is 969 metres (3,180 ft) below sea level, it is still twice as tall, measured from the base of its southern flank, as Mount St. Helens ever was?
Question 7: ________ that originate on the volcano enter three main river systems: the Toutle River on the north and northwest, the Kalama River on the west, and the Lewis River on the south and east.
Question 10: [19] During the first century, mudflows moved 30 miles (50 km) down the Toutle and Kalama river valleys and may have reached the ________.