A pyroclastic flow travels down the NNW flank of Arenal on 5 May 1998, over light-colored deposits from earlier flows. As many as 23 pyroclastic flows took place during a 6-hour period that afternoon, descending the upper reaches of the Tabacón drainage basin. The pyroclastic flows reached estimated velocities of 60 km/hour.

Photo by Olger Aragón, 1998.

This image is made available under the Creative Commons BY-NC-ND 4.0 license terms.

Keywords: eruption | explosive eruption | ash plume | ash | pyroclastic flow | pyroclastic density current (PDC) | stratovolcano | deposit

Arenal