Archeomagnetism of Jesuit Missions in South Brazil (1657-1706 AD) and assessment of the South American database

- Three high-quality archeointensity data are presented for South America.
- The South American database is reassessed to retain only high-quality entries.
- The filtered results are coherent and define a well-behaved evolution of the field.
- We prove the 6-specimen average technique does not correct for anisotropy effects.