At 1.35pm on Monday 2 March 1987, the southern Bay of Plenty was shaken by a magnitude 5.2 earthquake. Seven minutes later, a very shallow earthquake of 6.3 shook the same area causing significant damage to major industrial plants, houses, bridges, roads and services in the area.
This bulletin features many photos showing damage along with comment on lessons to be learned.
Houses on simple piles are vulnerable to foundation failure unless adequate bracing of the subfloor system is provided.
Different types of shaking result when separate parts of a building are founded on different types of foundation. Often damage will occur at the junction of the differing parts. Chimneys are particularly vulnerable.
Publication date: December 2003 Keywords: earthquake, foundations