If an extreme storm drops enough rain on one branch of a river to cause a 100-year flood, but no rain falls over another branch, the flood wave downstream from their junction might have a recurrence interval of only 10 years.
32.
Subsequent studies revealed submarine landslides in Fallen Leaf Lake and Lake Tahoe that are thought to have been triggered by earthquakes on the West Tahoe fault and the timing of these events suggests a recurrence interval of 3, 000-4, 000 years.
33.
The significant amount of vertical displacement in 1989 was a key aspect to consider because a long-term sequence of 1989-type events ( with an 80 100-year recurrence interval ) normally result in regions with high topographic relief, which is not seen in the Santa Cruz Mountains.
34.
For both waves of rainfall, several locations neared or exceeded 24 hour rainfall amounts estimated as having a 1 % chance of being exceeded in a given year, ( 100 year average recurrence interval ) as determined by both the National Weather Service Technical Paper 40 and reports by the Southern Regional Climate Center.
35.
Bangladesh and surrounding areas of eastern India suffer from a couple tornadoes annually of similar severity to stronger tornadoes in the US . These occur with a greater recurrence interval ( although over a smaller region ), and tend to be under-reported due to the scarcity of media coverage of a developing country.
36.
The recurrence interval for a series of large earthquakes starting in 1899 ( including the 5.9 1937 Terwilliger Valley earthquake ) was 18, 5, 14, 5, 12, 14, and 19 years, yet there has not been a strong earthquake for years ( since the 1987 Superstition Hills and Elmore Ranch sequence ).
37.
From the averaged coupling coefficient of 0.5 & ndash; 0.8 in the source area and the seismic moment, it was estimated that the slip deficit of this earthquake was accumulated over a period of 260 & ndash; 880 years, which is consistent with the recurrence interval of such great earthquakes estimated from the tsunami deposit data.
38.
In the San Francisco Bay Area, the San Andreas system of faults spans offshore and into the East Bay area, with the bulk of the faults lying to the east of the main SAF . There is a 70 % probability that one of these faults will generate a M6.7 or greater earthquake before 2030, including the Hayward Fault Zone, which has gone beyond its average recurrence interval of 130 years.
