A method for predicting an earthquake, comprising the steps of - obtaining timing, magnitudes and locations of a plurality of registered earthquakes from an earthquake catalogue - plotting said magnitudes of said registered earthquakes for a location over time. - identify a period where the maximum values are decreasing and the minimum values are increasing - draw a best-fit line (Esr) through all maximum magnitudes and a best fit line(Esa) through all minimum values in said period - where the two lines cross, draw a vertical line (Es) - draw a line from at least one of the minimum points of magnitude to the maximum magnitude next in time of this minimum point and extend this line until it crosses the vertical line Es - This last crossing point gives the prediction of time and magnitude for the next earthquake.