A huge swarm of earthquakes that has been rocking Japan for three years appears to be the result of fluids moving through an extinct, collapsed volcano, new research suggests.
The swarm is happening on the Noto Peninsula by the Sea of Japan, on the north coast of the country. There has not been volcanic activity in this area for 15.6 million years. However, a new study published June 8 in the journal JGR Solid Earth found that the quakes are occurring in a pattern that suggests liquid magma is still moving around deep below the surface in an ancient, collapsed caldera.
