Canlaon volcano (also spelled Kanlaon), the most active of the central
Philippines, forms the
highest point on the island of Negros. The massive 2435-m-high stratovolcano
is dotted with
cones and craters, many of which are filled by
The summit of Canlaon contains a broad northern crater with a crater-lake
and a smaller,
but higher, historically active crater to the south. The largest debris
avalanche known in the
Philippines traveled 33 km to the SW from Canlaon.
Historical eruptions, recorded since 1866, have typically consisted
of phreatic explosions
of small-to-moderate size that produce minor ashfalls near the volcano.
September 19th, 2003
From PHIVOLCS the following summarized activity at Canlaon from
to 23 July 2003:
This included the ash ejections of 10 and 11 July . There were
46 ash explosions recorded
since March, characterized by emission of steam clouds with small
amounts of ash rising
100-1,500 m above the active crater. Prevailing winds dispersed
the ash mainly SW and
SE, which settled predominantly over the mid-upper slopes of the
Seismic activity remained elevated through this period, with
epicenters of some high-
frequency events located near the active crater, focal depths
ranged from near-surface
down to 18 km. From June to July, the numbers of recorded low-frequency
earthquakes and low-frequency short-duration harmonic tremor events
This coincided with phreatic episodes between 8 June and 23 July
On 23 July an ash explosion was observed from Kanlaon Volcano
8.5 km ESE of the crater. Ash-laden steam clouds were ejected
to heights of ~800 m
above the active crater. After 23 July only weak steam emission
and seismic activity returned to low levels.
Latest news always on top. Below are
crater at Canlaon
August 10th, 1996
At 14:31 an ash ejection at
Canlaon killed three hikers (see red frame below) and emitted
a dirty-white steam-and-ash plume. The plume rose 1,500 m above
the central crater at the
The ash ejection lasted about 24 minutes, based on seismic records.
Accompanying the ash
ejection was a small explosion-type earthquake. The ejected ash
drifted to NE and was
observed at an altitude of 7.6 and 11.3 km by aviators.
The Bureau of Meteorology - Darwin, issued a volcanic ash advisory,
describing the plume
as extending SW for 110 km.
PHIVOLCS established a Level 1 alert but no evacuation was advised.
They also promptly
warned the public to stay outside the 4-km-radius permanent danger
Based on the previous character of ash ejections of Canlaon, which
were clustered in time, it was judged that the volcano could have
more explosions without showing any additional
forewarning signs. After the ash ejection, there were moderate
emissions of white to
dirty-white steam that rose 100 - 150 m before drifting NE.
On 11 August more emissions of white steam were noted between
the hours 0353 and 0500.
Two mountaineering groups were present on the summit at the
moment of the
explosion. A group of students from a Belgian University and
guides, and two British visitors accompanied by a local guide.
Three people, one British and two Filipino were killed. Some
Filipinos managed to make it off the mountain before darkness
efforts, but other survivors were forced to spend the night
there and were
retrieved the day after by helicopter.*).
Some of the 18 survivors were hospitalized because of injuries
by falling ejecta.
*)Military helicopters begun bringing down the victims
of Mt. Kanlaon's
Saturday eruption. Ten of the climbers were brought down Saturday
and seven others, along with the three dead, were airlifted
crater rim down to Bacolod Sunday.
Most were weak and still in a state of shock when the choppers
came by to
rescue them. Most of the injured were treated for serious
October 11th, 1969
Canlaon Volcano on Negros Island erupted 2200 on 11 October
(local time). Activity was
ash eruption only. Present activity slight emission of white steam.
No lava flow observed.
Eruption consisted of ash laden clouds, air shock manifested during
Ash deposited on W slope of volcano.
Canlaon erupted at 2205 local time. An earthquake was
felt in the vicinity. A mild ejection
of ashes on the western slope; eruption cloud of white smoke for
25 minutes; no report of
molten lava; very little change in physical and biological environment.
Present activity is quiet.