Hazard map, produced in 2011, showing the extent of a worst-case scenario base surge, where eruptive material shoots out in all directions. Credit: PHIVOLCS

Hazard map, produced in 2011, showing the extent of a worst-case scenario base surge, where eruptive material shoots out in all directions. Credit: PHIVOLCS

Hazard map, produced in 2011, showing the extent of a worst-case scenario base surge, where eruptive material shoots out in all directions. Credit: PHIVOLCS

Follow her