Hundreds of dikes can invade the cone and inner core of a volcano, often along zones of structural weakness. Left: An exposed dike, approximately five feet wide, at the caldera of Mauna Loa ...

showing the structure of the volcano and the mobile south flank. The June 17 dike intruded into the East Rift Zone and triggered the slow-slip event, that most likely occurred on the decollement ...

Volcanic fissures have been opening up above an approximately 9.3-mile-long vertical dike of magma—which runs northeast to southwest—formed in a weak point in the Earth's crust. This is being ...

Volcanic fissures have been opening up above an approximately 9.3-mile-long vertical dike of magma—which runs northeast to southwest—formed in a weak point in the Earth's crust in November.