The Levantine Iron Age Anomaly (LIAA) was a geomagnetic anomaly which occurred between 1050 and 700 BCE.[1]
The anomaly was identified and dated via iron oxide grains baked into ancient bricks from Mesopotamia.[2] The names of Mesopotamian kings inscribed into the cuneiform tablets helped scientists determine the dates of the anomaly.[2]
Tema, E.; Di Chiara, A.; Herrero-Bervera, E., eds. (2020). Geomagnetic Field Variations in the Past: New Data, Applications and Recent Advances. United Kingdom: Geological Society. ISBN978-1786204738.