NAME OF
VOLCANO:
PARKER
LOCATION:
Cotabato, approximately
30 aerial kilometers west of General Santos City
and
44 kilometers south of Marbel
(6°06.8' N, 124°53.5' E)
PHYSICAL FEATURES
Elevation:
1.784 km
Base Diameter:
40 km
Type of Volcano: Stratovolcano
Crater Lake:
Lake Maughan (caldera lake of roughly 2-km
diameter)
GEOLOGICAL FEATURES
Rock Type:
Andesite
Tectonic Setting:
Cotabato Arc
Age of Deposits:
205 +_ 40 (Radiocarbon age , ybp), 1651-1955 AD (Calendar Age)
VOLCANIC ACTIVITY
Number of Historical Eruptions:
1
Latest Eruption/Activity:
1641 Jan. 4
Volcanic Hazards:
pyroclastic
flows, airfall tephra, lahar, lake break-out
MONITORING ACTIVITY
1995 –
Emergency investigation
On 06 September
1995, an alleged volcanic activity was reported to have occurred on
its 2-km wide crater known as Lake Maughan. This alleged activity
caused extensive damage (landslide and flooding) along Ga-o River
which drains Lake Maughan and joins Allah River in the north. Due
to this phenomenon, PHIVOLCS installed seismograph at T’Boli and Bgy.
Hutol to verify the activity. It was found out later that the
activity was man-made.
Less than a year
after the 1995 activity, a temporary dam was formed at about 250 m
from the outlet of Lake Maughan, alarming the residents within the
area due to fear of flashfloods. The deposited landslide debris
dammed the flowing water along Ga-o River and caused the lake level
to rise by about 6 meters. Initial assessment of the survey team
sent revealed that the landslide impounded is weak. Such structure
may not be able to hold future increments of lake level ands thus
will eventually result to a catastrophic lake break-out.
1996 –
Establishment of seismic station
After the 1995
activity, a permanent remote seismic station was installed at Bgy.
Bagong Silang, located 06°5.23’N, 124°56.9’E and is about 6 km
east-southeast of Lake Maughan. This relays data acquired to the
manned station at Mindanao State University (MSU) Campus in Tambler,
General Santos City.
2004 – Establishment of
Matutum-Parker Seismic Network that would monitor both volcanoes
Monitoring Stations:
Central Station: General Santos Seismic & Volcano Station, MSU,
Tambler
Observation Stations:
·
Alnamang, Polomoloc, South Cotabato (Matutum)
·
Bagong Silang, Gen. Santos (Parker)
Repeater stations:
·
Upper Klinan, South Cotabato (Matutum)
·
Silway, Gen. Santos City (Matutum)
·
San
Jose, Gen. Santos City (Parker)
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