{ "id": 3822, "url": "https://svs.gsfc.nasa.gov/3822/", "page_type": "Visualization", "title": "Stereoscopic Magnetic Field Lines", "description": "This stereoscopic visualization shows a simple model of the Earth's magnetic field. The magnetic field partially shields the Earth from harmful charged particles emanating from the sun. The field is stretched back away from Sun by solar particle and radiation pressures.The geomagnetic field is generated (and regenerated) as the conducting fluid of the Earth's mantle and core, driven by convection of heat from deeper in the interior, induces an electromotive force (EMF) with the existing magnetic field. This process is very similar to the way an electric generator generates a voltage. That voltage then drives an induced current in the conducting fluid, which also produces a magnetic field. This feedback mechanism helps maintain the field, continuously converting the thermal energy in the Earth into magnetic field energy.The magnetic field line data used in this visualization is from a simplified static model. More complex models deform the magnetic field over time as the Earth rotates and experiences solar pressures. Many of the field lines (particulary near the back, away from the Sun) should eventually connect (north and south poles), but the 3d model used in this visualization does not extend far enough to see this.The day/night terminator is aligned with the Sun and is therefore aligned with the magnetic field too. This visualization is based on a previous monoscopic visualizaton that included magnetic field line data. || ", "release_date": "2011-02-14T00:00:00-05:00", "update_date": "2023-05-03T13:53:52.877595-04:00", "main_image": { "id": 487845, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003800/a003822/magField_anaglyph.1_print.jpg", "filename": "magField_anaglyph.1_print.jpg", "media_type": "Image", "alt_text": "Anaglyph movie of Earth's magnetic field", "width": 1920, "height": 1080, "pixels": 2073600 }, "main_video": { "id": 487840, "url": "https://svs.gsfc.nasa.gov/vis/a000000/a003800/a003822/magField_anaglyph.mp4", "filename": "magField_anaglyph.mp4", "media_type": "Movie", "alt_text": "Anaglyph movie of Earth's magnetic field", "width": 1920, "height": 1080, "pixels": 2073600 }, "main_credits": { "Visualizations by": [ { "name": "Greg Shirah", "employer": "NASA/GSFC" } ] }, "progress": "Complete", "media_groups": [ { "id": 352164, "url": "https://svs.gsfc.nasa.gov/3822/#media_group_352164", "widget": "Basic text with HTML", "title": "", "caption": "", "description": "This stereoscopic visualization shows a simple model of the Earth's magnetic field. The magnetic field partially shields the Earth from harmful charged particles emanating from the sun. The field is stretched back away from Sun by solar particle and radiation pressures.

The geomagnetic field is generated (and regenerated) as the conducting fluid of the Earth's mantle and core, driven by convection of heat from deeper in the interior, induces an electromotive force (EMF) with the existing magnetic field. This process is very similar to the way an electric generator generates a voltage. That voltage then drives an induced current in the conducting fluid, which also produces a magnetic field. This feedback mechanism helps maintain the field, continuously converting the thermal energy in the Earth into magnetic field energy.

The magnetic field line data used in this visualization is from a simplified static model. More complex models deform the magnetic field over time as the Earth rotates and experiences solar pressures. Many of the field lines (particulary near the back, away from the Sun) should eventually connect (north and south poles), but the 3d model used in this visualization does not extend far enough to see this.

The day/night terminator is aligned with the Sun and is therefore aligned with the magnetic field too.

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The magnetosphere protects Earth from the brunt of the sun's energetic outbursts. But some gigantic eruptions of solar material, called coronal mass ejections, can nonetheless compress the shape of the magnetosphere, creating a geomagnetic storm. During strong geomagnetic storms, the fluctuation of magnetism and electricity near Earth can interfere with communication and GPS satellites, induce electrical surges in power grids on the ground and light up the skies with auroras. Watch the visualization below to see the shape of the magnetosphere that surrounds and cradles Earth, protecting it from the sun's explosions. || ", "release_date": "2012-04-24T00:00:00-04:00", "update_date": "2023-05-03T13:53:07.023230-04:00", "main_image": { "id": 477356, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a010900/a010954/auroraparticles_1024x576.jpg", "filename": "auroraparticles_1024x576.jpg", "media_type": "Image", "alt_text": "Energy funneled along compressed magnetic field lines creates auroras when the energized lines intersect.", "width": 1024, "height": 576, "pixels": 589824 } } ], "sources": [], "products": [ { "id": 13688, "url": "https://svs.gsfc.nasa.gov/13688/", "page_type": "Produced Video", "title": "NASA Explores Earth's Magnetic \"Dent\"", "description": "Music: \"Now We Wait\" by Kamal David Kamruddin [PRS]This video can be freely shared and downloaded. While the video in its entirety can be shared without permission, some individual imagery provided by pond5.com and Artbeats is obtained through permission and may not be excised or remixed in other products. Specific details on stock footage may be found here. For more information on NASA’s media guidelines, visit https://www.nasa.gov/multimedia/guidelines/index.html.Complete transcript available. || South_Atlantic_Anomaly_Still_2.jpg (1920x1080) [346.0 KB] || South_Atlantic_Anomaly_Still_2_print.jpg (1024x576) [139.2 KB] || South_Atlantic_Anomaly_Still_2_searchweb.png (320x180) [43.0 KB] || South_Atlantic_Anomaly_Still_2_web.png (320x180) [43.0 KB] || South_Atlantic_Anomaly_Still_2_thm.png (80x40) [4.8 KB] || 13688_South_Atlantic_Anomaly_Fine.mov (1920x1080) [2.6 GB] || 13688_South_Atlantic_Anomaly_Fine.webm (960x540) [65.7 MB] || 13688_South_Atlantic_Anomaly_Fine.mp4 (1920x1080) [292.9 MB] || 13688_South_Atlantic_Anomaly_Fine_lowres.mp4 (1280x720) [52.3 MB] || SAA.en_US.srt [3.5 KB] || SAA.en_US.vtt [3.5 KB] || ", "release_date": "2020-08-17T11:45:00-04:00", "update_date": "2023-05-03T13:44:45.144881-04:00", "main_image": { "id": 383413, "url": "https://svs.gsfc.nasa.gov/vis/a010000/a013600/a013688/South_Atlantic_Anomaly_Still_2.jpg", "filename": "South_Atlantic_Anomaly_Still_2.jpg", "media_type": "Image", "alt_text": "Music: \"Now We Wait\" by Kamal David Kamruddin [PRS]This video can be freely shared and downloaded. 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