En arqueomagnetisme ho podem fer millor

El trasllat de dades geomagnètiques al llarg de distàncies de centenars de quilòmetres, suposant que el camp terrestre és dipolar, és una pràctica comuna en arqueomagnetisme. Els errors associats a procedir d'aquesta manera gairebé mai es tenen en compte. Aquest treball analitza la distribució d'aquests errors en l'espai i en el temps i n'extreu conclusions útils per als arqueomagnetistes.El traslado de datos geomagnéticos a lo largo de distancias de centenares de kilómetros suponiendo que el campo terrestre es dipolar es una práctica común en arqueomagnetismo. Los errores asociados a proceder de esta manera casi nunca se tienen en cuenta. Este trabajo analiza la distribución de estos errores en el espacio y el tiempo y extrae conclusiones útiles para los arqueomagnetistas.The relocation of geomagnetic data across distances of hundreds of kilometers and assuming a dipolar geomagnetic field is a common practice in archaeomagnetism. The errors due to this practice are rarely taken into account. This work analyses the time and space distribution of these errors and some useful conclusions for archaeomagnetists have been highlighted

CONTRIBUTION OF ROCK MAGNETIC STUDIES TO DETERMINE DEPOSITIONAL MECHANISMS AND PARAMETERS OF THE "CAMPANIAN IGNIMBRITE" DEPOSITS

Rend. Acc. Sc. Fis. Nat., Napoli, Special Issu

DISTRIBUTION ANALYSIS OF ERRORS DUE TO RELOCATION OF GEOMAGNETIC DATA USING THE �CONVERSION VIA POLE� (CVP) METHOD. IMPLICATIONS ON ARCHAEOMAGNETIC DATA

Secular variation 'master' curves are built up using geomagnetic historical observations or archaeomagnetic data from a limited area and their use is usually restricted to regions of around 1000 km radius. Relocation of data within this distance is a common practice to enable comparison of data, although the errors due to such process are rarely taken into account. A detailed analysis of the distribution of relocating geomagnetic data has been done using three popular sets of geomagnetic models (IGRF-9, GUFM and CALS7K-2). This study improves the error analysis of relocating geomagnetic directions made up to date and expands it to geomagnetic intensities. Maximum errors correlate with the non-dipole to dipole field ratio. Archaeomagnetists could use this analysis to valuate the error introduced by reducing data