1. an instrument that automatically records variations in the earth’s magnetic field
Usage: scientific

Examples

• The observatory’s magnetograph detected unusual magnetic activity during the solar storm.
• Scientists use magnetograph data to study changes in Earth’s magnetic field.
• The magnetograph recorded a significant magnetic disturbance at midnight.
• Researchers analyzed magnetograph readings from the past decade.
• The new magnetograph provides more accurate measurements than previous models.
• Magnetograph stations around the world monitor geomagnetic variations continuously.