Relationship between Near-Field and Teleseismic Observations of Seismic Source Parameters

abstract This paper suggests a method for estimating the errors accompanying estimates of seismic source parameters. While the method is a general one, the data here are from 1962 and 1963 and special attention is given to a few regions, such as the Kuriles. The overall standard error of about one-half a degree in each coordinate and four seconds in origin time are broken down and analyzed in terms of magnitude, depth, and location in space and time. The most accurately located earthquakes appear to be those of intermediate depth and magnitude in highly seismic areas. There is some indication that these errors are decreasing with time.

Download Full-text

An Integrated System for Real Time Estimation of Seismic Source Parameters and Its Application to Tsunami Warning

Tsunamis in the World - Advances in Natural and Technological Hazards Research ◽

10.1007/978-94-017-3620-6_14 ◽

1993 ◽

pp. 177-196 ◽

Cited By ~ 3

Author(s):

D. Reymond ◽

O. Hyvernaud ◽

J. Talandier

Keyword(s):

Real Time ◽

Source Parameters ◽

Time Estimation ◽

Seismic Source ◽

Integrated System ◽

Tsunami Warning ◽

Seismic Source Parameters ◽

Real Time Estimation

Download Full-text

Far-field tsunami data assimilation for the 2015 Illapel earthquake

Geophysical Journal International ◽

10.1093/gji/ggz309 ◽

2019 ◽

Vol 219 (1) ◽

pp. 514-521 ◽

Cited By ~ 4

Author(s):

Y Wang ◽

K Satake ◽

R Cienfuegos ◽

M Quiroz ◽

P Navarrete

Keyword(s):

Data Assimilation ◽

Near Field ◽

Source Parameters ◽

Deep Ocean ◽

Seismic Source ◽

Far Field ◽

Complementary Method ◽

East Pacific ◽

2015 Illapel Earthquake ◽

Illapel Earthquake

SUMMARY The 2015 Illapel earthquake (Mw 8.3) occurred off central Chile on September 16, and generated a tsunami that propagated across the Pacific Ocean. The tsunami was recorded on tide gauges and Deep-ocean Assessment and Reporting of Tsunami (DART) tsunameters in east Pacific. Near-field and far-field tsunami forecasts were issued based on the estimation of seismic source parameters. In this study, we retroactively evaluate the potentiality of forecasting this tsunami in the far field based solely on tsunami data assimilation from DART tsunameters. Since there are limited number of DART buoys, virtual stations are assumed by interpolation to construct a more complete tsunami wavefront for data assimilation. The comparison between forecasted and observed tsunami waveforms suggests that our method accurately forecasts the tsunami amplitudes and arrival time in the east Pacific. This approach could be a complementary method of current tsunami warning systems based on seismic observations.

Download Full-text