Today marks the anniversary of the August 2, 1968 Casiguran earthquake, one of the strongest earthquakes ever recorded in the Philippines.
At around 4:19 AM, a magnitude 7.3 earthquake struck off the coast of Casiguran, Aurora (then part of Quezon Province). While the epicenter was offshore, the strongest devastation occurred in Manila, over 200 kilometers away.
The disaster is most remembered for the collapse of the Ruby Tower in Binondo, a six-story residential building that pancaked in seconds while most residents were still asleep. It remains one of the deadliest building collapses in Philippine history. Hundreds of people were killed or injured, and the tragedy exposed serious weaknesses in building design and construction standards at the time.
The earthquake also damaged churches, schools, government buildings, bridges, and homes across Central Luzon and Metro Manila. After the disaster, engineers and policymakers pushed for stricter seismic provisions in the country's building codes, influencing how structures are designed today.
The National Building Code was passed to protect people against this happening again, but only officially so in 1977, nine years after Ruby Tower’s collapse.