Although there is a lack of paleoseismic data on reverse faults in the Los Angeles area, a trench excavation at a site on the Sierra Madre-Cucamonga fault revealed that two large historic earthquakes occurred in the last 15, 000 years.
32.
The event occurred on a reverse fault near the north coast region of Papua New Guinea, from the coast near Aitape, and caused a large undersea landslide which caused a tsunami that hit the coast, killing at least 2, 183 people.
33.
There is much evidence for strike-slip in the Queen Charlotte Basin such as steeply dipping to vertical basins, deep and narrow asymmetric depocentres, upward branching complex fault patterns and contemporaneous normal and reverse faults within the same structure or local area.
34.
The M5.3 June 1988 and the M5.4 August 1989 events ( local magnitude ) also occurred on previously unknown oblique reverse faults and were within of the M6.9 Loma Prieta mainshock epicenter, near the intersection of the San Andreas and Sargent faults.
35.
The Verdugo Mountains consist of an east-west-trending antiformal fault block, bounded on south by the Verdugo Fault, a north-dipping reverse fault, and on the north by the Sierra Madre thrust fault near the front of the San Gabriel Mountains, thus including the sediment-covered Crescenta Valley within the Verdugo Mountains Block.
36.
Physiographically the district, which lies in a region of tectonic or folded and overthrust mountain chains, has strata are structurally marked by complex folds, reverse faults, overthrusts and nappes of great dimensions, all these as well as frequent earthquake of varying intensity give region to believe that the region is still unstable.
