Volcanological

The first eruption in close to 70 years had caught nearby towns and villages unaware, despite warnings from volcanological groups to evacuate due to increased seismological activity.

Knowing that a particular volcano exhibits this eruption memory effect means any temporary increase in probability can be appraised and, for example, inform decisions about volcanological fieldwork at the craters.

KILBURN: Pointing out the fact that access to the new excavations at Pompeii were being restricted to the volcanological community.

The 25-minute event began at 8:59 p.m. Sunday and was a hydrothermal eruption, according to the Volcanological and Seismological Observatory of Costa Rica (OVSICORI), based at Universidad Nacional (UNA).