DistWeight: Distance wheighting

In Rquake: Seismic Hypocenter Determination

Distance wheighting

Description

Distance weighting for non-linear earthquake location.

Usage

DistWeight(dist, err, distwt)
DistWeightLL(lat, lon, elat, elon, err, distwt)
DistWeightXY(x, y, ex, ey, err, distwt)

Arguments

dist	distance in km
err	sigma error in seconds
distwt	distance weighting parameter
lat	Latitude
lon	Longitude
elat	Event Latitude
elon	Event Longitude
x	station X(km)
y	station Y(km)
ex	event X (km)
ey	event Y (km)

Details

Based on Lquake scheme from University of Washington. If you need to reduce the effect of distance weighting, increase distwt.

Since the hypocenter moves between each iteration, the distance weighting is updated.

Value

vector of weights

Author(s)

Jonathan M. Lees<[e-mail]>

Examples

DistWeight(1:10, .4, 20)

Rquake documentation built on June 22, 2024, 11:54 a.m.