Space weather can have important consequences for our lives, such as interference with radio communication, GPS systems, electric power grids, the operation and orientation of satellites, oil and gas drilling, and even air travel as high altitude pilots and astronauts can be subjected to enhanced levels of radiation.
Are we about to have a magnetic reversal?
Almost certainly not.
Since the invention of the magnetometer in the 1830s, the average intensity of the magnetic field at the Earth's surface has decreased by about ten percent. We know from paleomagnetic records that the intensity of the magnetic field decreases by as much as ninety percent at the Earth's surface during a reversal. But those same paleomagnetic records also show that the field intensity can vary significantly without resulting in a reversal.
So a reduced intensity in the magnetic field does not necessarily mean that a reversal is about to occur. Moreover, the decrease in intensity is not a dramatic departure from normal. For all we know, the field may actually get stronger at some point in the not-so-distant future.
Predicting the occurrence of a reversal based on the current state of the magnetic field is extremely difficult. Reversals are not instantaneous--they take place over a period of hundreds to thousands of years. We wouldn’t know that a reversal is happening until it was half over.
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Space weather can have important consequences for our lives, such as interference with radio communication, GPS systems, electric power grids, the operation and orientation of satellites, oil and gas drilling, and even air travel as high altitude pilots and astronauts can be subjected to enhanced levels of radiation.
Main and auxiliary absolutes piers with Zeiss-Jena 010B Theodolites.
Main and auxiliary absolutes piers with Zeiss-Jena 010B Theodolites.
Absolutes pier at Deadhorse geomagnetic observatory.
Absolutes pier at Deadhorse geomagnetic observatory.
Jeff Fox using a theodolite at the Boulder geomagnetic observatory.
Jeff Fox using a theodolite at the Boulder geomagnetic observatory.
USGS scientist Duane Champion explains the Earth's geomagnetic qualities and the potential for and possible consequences of a geomagnetic shift.
USGS scientist Duane Champion explains the Earth's geomagnetic qualities and the potential for and possible consequences of a geomagnetic shift.
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Related
What do the different north arrows on a USGS topographic map mean?
Why measure the magnetic field at the Earth's surface? Wouldn't satellites be better suited for space-weather studies?
Does the Earth's magnetic field affect human health?
How does the Earth's core generate a magnetic field?
Do animals use the magnetic field for orientation?
Do any mass extinctions correlate with magnetic reversals?
Is the Earth a magnet?
Could magnetic reversals be caused by meteorite or comet impacts?
Is it true that Earth's magnetic field occasionally reverses its polarity?
Space weather can have important consequences for our lives, such as interference with radio communication, GPS systems, electric power grids, the operation and orientation of satellites, oil and gas drilling, and even air travel as high altitude pilots and astronauts can be subjected to enhanced levels of radiation.
Space weather can have important consequences for our lives, such as interference with radio communication, GPS systems, electric power grids, the operation and orientation of satellites, oil and gas drilling, and even air travel as high altitude pilots and astronauts can be subjected to enhanced levels of radiation.
Main and auxiliary absolutes piers with Zeiss-Jena 010B Theodolites.
Main and auxiliary absolutes piers with Zeiss-Jena 010B Theodolites.
Absolutes pier at Deadhorse geomagnetic observatory.
Absolutes pier at Deadhorse geomagnetic observatory.
Jeff Fox using a theodolite at the Boulder geomagnetic observatory.
Jeff Fox using a theodolite at the Boulder geomagnetic observatory.
USGS scientist Duane Champion explains the Earth's geomagnetic qualities and the potential for and possible consequences of a geomagnetic shift.
USGS scientist Duane Champion explains the Earth's geomagnetic qualities and the potential for and possible consequences of a geomagnetic shift.