1968 Casiguran earthquake
Violent earthquake and tsunami in Aurora Province, Philippines
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The 1968 Casiguran earthquake occurred on 04:19:22 local time on August 2 with a moment magnitude of 7.6 and a maximum Mercalli intensity of IX (Violent). The thrust earthquake's epicenter was in Casiguran, Quezon (now part of Aurora province). A small non-destructive tsunami was generated and at least 207 people were killed. The majority of the deaths occurred in the collapse of a six-story building in Manila.
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| Epicenter | 16.316°N 122.067°E[1] |
| Type | Thrust[3] |
| Areas affected | Philippines |
| Max. intensity | MMI IX (PEIS VIII)[2][1] |
| Tsunami | .3 m (1 ft 0 in)[4] |
| Foreshocks | 10+[3] |
| Casualties | 207–271 dead, 261 injured[4] |
Damage
In Manila, many structures that suffered severe damage had been built near the mouth of the Pasig River on huge alluvial deposits. A number of buildings were damaged beyond repair while others only suffered cosmetic damage. 268 people were reported to have died during the collapse of the six-story Ruby Tower, located at the corner of Doroteo Jose and Teodora Alonzo Streets in the district of Santa Cruz.[5][a] The entire building, save for a portion of the first and second floors at its northern end, was destroyed. Allegations of poor design and construction, as well as the use of poor-quality building materials arose.[7] In the district of Santa Ana, one person was injured by debris from a damaged apartment building. Two more people from Aurora sub province and Pampanga died as a direct result of the quake. Around the town of Casiguran, there were several reports of landslides, the most destructive one at Casiguran Bay.[8]
Aftershocks
Aftermath and legacy
The former location of Ruby Tower in Santa Cruz district is now a memorial hall which stands today.[7][10]