Measurements of magnetic field surrounding the Mount St. Helens' dome
![Measurements of the magnetic field surrounding the Mount St. Helens...](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/vhp_img549.jpg?itok=E7Ay_iOf)
Detailed Description
The strength of the magnetic field increased as the dome cooled and magnetic minerals formed. During the eruptions the strength usually changed rapidly as magma heated and deformed the dome.
Sources/Usage
Public Domain.