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15 lines
456 B
Go
15 lines
456 B
Go
package seismo
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import (
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"hayai/constants"
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"github.com/jftuga/geodist"
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)
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func CalculateEquivalentMagnitude(earthquakeMagnitude float64, earthquakeLat, earthquakeLon, userLat, userLon float64) float64 {
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var earthquake = geodist.Coord{Lat: earthquakeLat, Lon: earthquakeLon}
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var user = geodist.Coord{Lat: userLat, Lon: userLon}
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_, km, _ := geodist.VincentyDistance(earthquake, user)
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return earthquakeMagnitude - km*constants.MagnitudeDecreasePerKM
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}
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