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Table 2 Number of surveys and magnetic measurements (after filtering and sub-sampling) used in the study

From: Comparison of global geomagnetic field models and evaluation using marine datasets in the north-eastern Atlantic Ocean and western Mediterranean Sea

Area of interest

Number of surveys

Number of magnetic measurements

NEAWM area (i.e. full dataset)

71

1,070,035

Mid-Atl. ridge 20–45°N

17

362,564

Canarian Isl. to offshore west Portugal

16

227,584

Bay of Biscay

5

47,609

English Channel to North Sea

26

138,024

W. Mediterranean Sea

23

294,254