What is a lahar?

The word lahar comes from Indonesia, refering to mudflows that are volcanic in origin.

AGU abstracts

1992 Fall AGU
1993 Fall AGU

Images of lahars

PHIVOLCS lahar observers aquire an active flow sample for analysis
Lahar falls near Abacan Gap, Lower Sacobia River.
Anti-dune waves along the Sacobia River near Clark Air Base. Flow direction is left to right. Pumices raft on the surface while a dense slurry of sediment flows beneath.
A church over run by lahar after a typhoon June 26 1993
Church buried under 5 meters of lahar, one in background survives for now
PHIVOLCS lahar monitoring teams check out damage after lahar event

Movies (mpegs) of lahars

Film footage of large cobble rich lahar front passing observers along Sacobia River
Film footage of lahar pulse cascading over erosional nickpoint
Film footage of small cobble rich lahar front passing observers along Sacobia River
Film footage of remobilized pyroclastic material into small secondary pyroclastic flows
Film footage of overbank sheet flows resembling wet concrete
Film footage of standing waves in lahar flow. Waves 2-3 meters high from base of channel.
mtdolan@mtu.edu