The West Valley Fault has a 400-year cycle. The West Valley Fault, a 100-kilometer fault, is one of the segments of an active fault, the Valley Fault System.The West Valley Fault transects portions of:
- Quezon City
- Marikina
- Makati
- Pasig
- Taguig
- Muntinlupa
- Bulacan (Doña Remedios Trinidad, Norzgaray, San Jose Del Monte City)
- Rizal (Rodriguez)
- Laguna (San Pedro City, Biñan, Sta Rosa, Cabuyao, Calamba)
- Cavite (Carmona, General Mariano Alvarez, Silang)
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If the West Valley Fault moves, the whole of Metro Manila will be affected in varying degrees. These areas may feel that up and down motion.
| Caloocan | Paranaque |
| Las Pinas | Pasay |
| Malabon | Pasig |
| Makati | Pateros |
| Mandaluyong | Quezon City |
| Manila | San Juan |
| Marikina | Taguig |
| Muntinlupa | Valenzuela |
| Navotas |
TRIVIA:
(via : http://www.rappler.com/move-ph/issues/disasters/knowledge-base/93746-maps-west-valley-fault-earthquake-scenarios)
