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- Huge amount of water in Earth’s mantle (2)
- Final reports from the Planck Cosmic Microwave Background Measurements
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- 2017 Oppenheimer Lecture by John Preskill on Quantum Computing
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- The Legacy of the Tevatron by S.D. Holmes and V.D. Shiltsev
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Category Archives: geophysics
2019 update on the location of the magnetic north pole
image credit Magnetic north pole has been drifting from Canada to Siberia. The drift speed is accelerating. This prompted scientists to update the World Magnetic Model recently. GPS system, navigational systems used by satellites, aircraft, ships, submarines and other vehicles rely … Continue reading
Posted in geophysics
Tagged magnetic north pole
Earth’s hum
I sometimes take notes and return to those notes later. This is from 2017. There was an article at The Washington Post titled “Scientists are slowly unlocking the secrets of the Earth’s mysterious hum“. National Geographic published an article on … Continue reading
Posted in geophysics
Huge amount of water in Earth’s mantle (2)
In a previous post (4 years ago) I brought your attention to the existence of huge amount of water in Earth’s mantle. Quanta magazine recently reported on the latest news on this front: The Hunt for Earth’s Deep Hidden Oceans. … Continue reading
Posted in geology, geophysics
Tagged Earth's mantle, oceans
Update on how Earth’s magnetic field is changing
The European Space Agency (ESA) has a trio of satellites known as SWARM that studies Earth’s magnetic field. “Launched in 2013, the trio of Swarm satellites are measuring and untangling the different magnetic fields that stem from Earth’s core, mantle, … Continue reading
Posted in geology, geophysics
Tagged Earth, Earth's magnetic field, ESA, SWARM
European Space Agency’s Magnetic Field Mission SWARM
Image credit: ESA/ATG Medialab European Space Agency (ESA) has 3 satellites that work in a coordinated fashion to measure Earth’s changing magnetic field. Here’s the description from ESA “Swarm, a constellation of three satellites, studies Earth’s magnetic field. Swarm aims … Continue reading
Posted in geophysics
Tagged Earth's magnetic field, ESA SWARM Mission, European Space Agency
Al-Biruni
image credit I feel so ashamed for not knowing much about al-Biruni – the polymath who lived in the 11’th century. His name was brought to my attention by a newspaper article announcing the establishment of a new private university … Continue reading
Posted in geometry, geophysics, history, inspiration, linguistics, mathematics, philosophy, physics, Turkish
Tagged al-Biruni, Indology, mathematics, physics, polymath
Moon stabilizes Earth
Image credit Earth’s moon is relatively large. This is unique for large planets in our solar system. Mercury and Venus have no moons, and Mars has only two small asteroid-sized objects (Phobos and Deimos) orbiting it. Uranus has 27 known … Continue reading
Posted in geophysics
Tagged Earth, Moon
Recent changes in Earth’s magnetic field
Image credit According to geologic record in the minerals, Earth’s magnetic dipole polarity reversed many times during the planet’s 4.5 billion year history. The average time between reversals is 250 thousand years. There were no reversals in the last 780 … Continue reading
Posted in energy, geology, geophysics, mind, physics, precession of Earth, precession of equinoxes
Tagged Earth, geodynamo, Magnetic field, magnetic north, polar shit
Huge amount of water in Earth’s mantle
Evidence [1][2][3][4] is growing for the theory [5] that claims that the amount of water in Earth’s “transition zone” (see the graphics above) is as much as the water contained in all oceans. Why is this important? More water in … Continue reading
Posted in geophysics
Tagged lower mantle, transition zone, upper mantle
Difference between sidereal day and solar day on Earth
An Earth day can be measured in different ways. Measure the time it takes for a complete rotation of Earth around its axis. Measure the time it takes for the Sun to appear in the same meridian in the sky. … Continue reading
Posted in geophysics, science, society
Tagged axial tilt, Earth, ecliptic, planets, sidereal day, solar day
Live map of the winds across the Earth
The live map of the winds across the Earth Once the image comes up you can rotate the Earth image using your mouse (click on the image and move the mouse while pressing the mouse button) and see the green … Continue reading
Posted in geophysics, science
Tagged geology, geophysics, science
If all the polar ice melted
The super typhoon Haiyan devastated Philippines. I experienced the super storm Sandy in the NYC area. During Sandy the sea level rose 12 ft (approximately 4 meters). During Haiyan the sea level rose 16 ft (approximately 5 meters). 12 ft … Continue reading
Posted in geophysics, society
Tagged Hurricane Sandy, Ice sheet, Philippines, Sea level
Life on Earth critically depends on the magnetic field
Life on Earth critically depends on Earth’s magnetic field. We should know more about it and the dynamo that generates it. Compasses point to the magnetic north pole. Birds follow the magnetic field lines during their seasonal migrations. Earth’s magnetic … Continue reading
Posted in geophysics
Tagged Dipole, Earth, Earth's magnetic field, Electromagnetism, Inner core, Magnetic field, Outer core, physics
Rapid Climate Change 11.5 Thousand Years Ago
Introduction Human pre-history is shaped by climate changes, genetic mutations, development of ego-consciousness, development of languages and the specific eras such as the “Great Leap Forward” (Homo Sapiens moving out of Africa) and the transition from hunting and gathering to “food … Continue reading
Posted in geophysics
Tagged climate, geophysics, physics
Past and Future Pole Shifts
Introduction Pole Shift is a controversial subject and is debated passionately. During these discussions people tend to forget the basic physics, the law of the conservation of angular momentum which dictates that the average axial tilt angle with respect to … Continue reading
Posted in geophysics
Tagged climate, geophysics, physics
Suresh Emre