All predictions of the future can be to some extent successful by chance. This is a crucial issue mostly overlooked in assessing the validity of earthquake precursors. We analyse statistically the effectiveness of VAN predictions beyond chance by studying the complete list of predictions for the period 1987 January 1–1989 November 30 recently published by Varotsos & Lazaridou (1991) using any possible combination of the ‘rules of the game’ that they consider. We find that the apparent success of VAN predictions can be confidently ascribed to chance; conversely, we find that the occurrence of earthquakes with Ms≥ 5.8 is followed by VAN predictions (with identical epicentre and magnitude) with a probability too large to be ascribed to chance. Copyright © 1992, Wiley Blackwell. All rights reserved
Evaluating the statistical validity beyond chance of ‘VAN’ earthquake precursors / Mulargia F.; Gasperini P.. - In: GEOPHYSICAL JOURNAL INTERNATIONAL. - ISSN 0956-540X. - STAMPA. - 111:1(1992), pp. 32-44. [10.1111/j.1365-246X.1992.tb00552.x]
Evaluating the statistical validity beyond chance of ‘VAN’ earthquake precursors
Mulargia F.
Primo
Membro del Collaboration Group
;Gasperini P.Ultimo
Membro del Collaboration Group
1992
Abstract
All predictions of the future can be to some extent successful by chance. This is a crucial issue mostly overlooked in assessing the validity of earthquake precursors. We analyse statistically the effectiveness of VAN predictions beyond chance by studying the complete list of predictions for the period 1987 January 1–1989 November 30 recently published by Varotsos & Lazaridou (1991) using any possible combination of the ‘rules of the game’ that they consider. We find that the apparent success of VAN predictions can be confidently ascribed to chance; conversely, we find that the occurrence of earthquakes with Ms≥ 5.8 is followed by VAN predictions (with identical epicentre and magnitude) with a probability too large to be ascribed to chance. Copyright © 1992, Wiley Blackwell. All rights reservedI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
