Philippine Standard Time
 
COMPILATION OF DAMAGING EARTHQUAKES OF THE PHILIPPINES
Panay Earthquake - 14 June 1990

On 14 June 1990, an earthquake measuring 7.1 in the Richter Scale hit Panay Island at 3:41 P.M., killing 8 and injuring 41 people. The epicenter was located at 11.34°North latitude; 122.10° East longitude, in the vicinity of Culasi, Antique. The depth was computed to be 15 kilometers. It was generated by fault movement in the collisional zone off western Panay Island.

 

The tremor was felt in the following places (in PHIVOLCS Earthquake Intensity Scale (PEIS)):

Intensity VII                Culasi, Antique; Libacao, Aklan
Intensity VI                 Balete, Kalibo, Madalag, Numancia, Altavas & Makato in Aklan; Sigma & Cuartero

                                     in Capiz, and; Calinog in Iloilo

Intensity V                  Northern part of Negros Island
Intensity IV                 Romblon and the rest of Negros Island
Intensity III                 Cebu City; Taal; Mayon; Palo, Leyte
Intensity II                  Cagayan de Oro & Camiguin Island

A quick response team dispatched to the area reported the following observations:

 

Culasi, Antique

  • Seven persons perished and 31 others suffered mild to severe injuries.
  • About 15% of the residential houses collapsed, the rest were partially damaged.
  • Several commercial buildings, namely: San Miguel Beer and Coca-cola warehouse; half portion of the Rural Bank of Culasi building; the Esperanza Elementary School, and the Seventh-Day Adventist church collapsed.
  • Four bridges totally collapsed.
  • Fissures measuring 82.5 x 0.8 x 0.91meters, and 4 x 0.8 x 0.9meters were noted in two barangays.
  • Upliftment occurred in Barangay Bagacay of 0.6 meters with an approximate area of 3,000 square meters.
  • Landslides were noted along the slope of Mt. Madya-as. The volume of materials carried by the landslide was approximately 30,000 cubic meters in Bagacay.
  • Fifty-seven families (about 342 persons) were evacuated.

 

Libacao, Aklan

  • Five concrete residential buildings were totally damaged, while thirty structures were partially damaged.
  • Two churches and a river control project were heavily damaged.
  • Five highway bridges were partially damaged.

 

Balete, Aklan

  • The Baptist church and the public market were heavily damaged, while an icon was toppled down.
  • The Rural Health Center and a rice mill collapsed.
  • The Balete district hospital was badly damaged and was declared dangerous for future use.
  • Partial damage to another public market and on the approach of some bridges.
  • One residential house totally collapsed and ten others were partially damaged.
  • Thirty-five people were evacuated to the Catholic Church.
  • A fissure measuring 2 km long and 136 cm wide, trending N50W was noted along Jaro River.

 

Madalag, Aklan

  • The municipal and district hospital sustained some cracks.

 

Kalibo, Aklan

  • Aklan Science High School and Alan Cinema were partially damaged.
  • The Catholic Church of Kalibo that is made of bricks suffered cracks on its walls.
  • A house made of ceramics was partially damaged.

 

Numancia, Aklan

  • Sandboil was observed.

 

Altavas, Aklan

  • The wharf was partially damaged.
  • There were cracks on the walls of the Cathedral and the head of an icon was damaged.

 

Makato, Aklan

  • The sports complex was partially damaged.
  • The posts and beams of the public market were damaged.

 

Kalinog, Iloilo

  • Various buildings of the Philippine Constabulary Regional Command were damaged.
  • The Catholic Church was partially damaged.

 

Cuartero, Capiz

  • A church and several houses were partially damaged.

 

Sigma, Capiz

  • A bridge and a communication tower were partially damaged.

 

Estimated total amount of damage is about 30 million pesos.

 

 

References:

1. PHIVOLCS Observer. . . . . .July 1990 ISSN 01-16-07-45
2. PHIVOLCS Observer. . . . . .January-March 1990

 

Acknowledgement:

The Quick Response Team (QRT) Members: Jimmy Sincioco - Team Leader; Ariel Rasdas; Rod Medrano; Jerry Diolata; Dindo Javier; Nelson Mondia

Pictures used were taken by Mr. Dindo Javier, and through the kindness of Ms. Louie de Guzman of the TID.

 Focal Mechanism Panay

 

Strk1 225

Dip1 75
Rake1 -172
Strk2 133
Dip2 83
Rake2 -15

 

P-axis Plunge 16
            Azimuth 88
T-axis Plunge 5
            Azimuth 179

 

Isoseismal Map Panay 

 

Reported intensities (in PHIVOLCS Earthquake Intensity Scale (PEIS)):

 

Intensity VII            Culasi, Antique; Libacao, Aklan
Intensity VI              Balete, Kalibo, Madalag, Numancia, Altavas & Makato in Aklan; Sigma & Cuartero in

                                  Capiz, and; Calinog in Iloilo
Intensity V               Northern part of Negros Island
Intensity IV              Romblon and the rest of Negros Island
Intensity III              Cebu City; Taal; Mayon; Palo, Leyte
Intensity II               Cagayan de Oro & Camiguin Island

Pictures

panay1

panay2

panay3

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