There is a magnetic anomaly in the centre of the lake.
The impact theory would also account for magnetic anomalies on the moon.
Reports of magnetic anomalies turned out not to show consistency across the sites.
A further hazard to shipping is a magnetic anomaly in the area.
We struck no magnetic anomalies that suggested the mass of an automobile.
"Perhaps we passed through an area of magnetic anomaly," Spock suggested.
The magnetic anomalies in connection with the impact crater might be related to the phenomenon.
This is one of the strongest localized magnetic anomalies on the Moon.
It identifies some prominent magnetic anomalies on the African continent.
This phenomenon played a role in controversies over marine magnetic anomalies.