The potential hazard from tsunami and Seiche waves generated by large earthquakes within Lake Tahoe, California-Nevada
Abstract
We investigate the potential of local earthquakes to generate tsunamis and seiches within Lake Tahoe. We calculated the long wavelength oscillations generated by 3 hypothetical Mw >7 earthquake scenarios for faults with normal slip directly under and outside the lake basin. The scenarios involving fault slip under the lake are the North Tahoe-Incline Village and West Tahoe-Dollar Point scenarios. The Genoa scenario involves a fault that crops out 10 km east of the lake. Faulting beneath the lake generates a tsunami followed by a seiche that continues for hours with waves as high as 3 to 10 m. The seiche potentially threatens low lying lakeside communities and lifelines. We also compare the spectral characteristics of synthetic tide gauge records with wind swell observations. The fundamental mode calculated for a seiche is consistent with the wind swell observations.
- Publication:
-
Geophysical Research Letters
- Pub Date:
- April 2000
- DOI:
- 10.1029/1999GL011119
- Bibcode:
- 2000GeoRL..27.1203I
- Keywords:
-
- Oceanography: General: Numerical modeling;
- Oceanography: Physical;
- Oceanography: Physical: Tsunamis and storm surges;
- Seismology: Seismic hazard assessment and prediction;
- Oceanography: Physical: Air/sea interactions (0312)