Results 71 to 80 of about 733 (165)

Empiric Models of the Earth's Free Core Nutation

, 2009
Free core nutation (FCN) is the main factor that limits the accuracy of the modeling of the motion of Earth's rotational axis in the celestial coordinate system. Several FCN models have been proposed.
A. A. Brzeziński, G.A. Krasinsky, G.A. Krasinsky, J. Hinderer, J. Vondrák, M. Schmidt, T. Shirai, T. Shirai, T. Shirai, T.A. Herring, W. Schlueter, Z. M. Malkin   +11 more
core   +1 more source

Could the Mw = 9.3 Sumatra earthquake trigger a geomagnetic jerk? [PDF]

Eos, Transactions American Geophysical Union, 2005
The magnetic field observed at the Earth's surface is not a stationary feature. It is characterized by time variations ranging from milliseconds (micropulsations) to millions of years (the time interval between field reversals). Time variations with periods of a year or longer are related to Earth's outer core sources, whereas for shorter timescales an
Florindo f., De Michelis P., Piersanti A., BOSCHI, ENZO   +3 more
openaire   +2 more sources

The environment to the rescue: can physics help predict predator–prey interactions?

Biological Reviews, Volume 99, Issue 6, Page 1927-1947, December 2024.
ABSTRACT Understanding the factors that determine the occurrence and strength of ecological interactions under specific abiotic and biotic conditions is fundamental since many aspects of ecological community stability and ecosystem functioning depend on patterns of interactions among species.
Mehdi Cherif, Ulrich Brose, Myriam R. Hirt, Remo Ryser, Violette Silve, Georg Albert, Russell Arnott, Emilio Berti, Alyssa Cirtwill, Alexander Dyer, Benoit Gauzens, Anhubav Gupta, Hsi‐Cheng Ho, Sébastien M. J. Portalier, Danielle Wain, Kate Wootton   +15 more
wiley   +1 more source

Twenty years of geomagnetic field observations at Mario Zucchelli Station (Antarctica) [PDF]

, 2007
During the 1986-87 austral summer a geomagnetic observatory was installed at Terra Nova Bay. During the first years both geomagnetic field time variation monitoring and absolute measurements were carried out only during summer.
Cullinane, C, Dutton-Regester, K, Filipp, FV, Gallagher, SJ, Gowrishankar, K, Gunatilake, D, Hayward, NK, Heinemann, A, Hersey, P, Madore, J, Mann, GJ, McArthur, GA, Pupo, GM, Strbenac, D, Tiffen, JC, Yang, JY   +15 more
core   +3 more sources

Space Weather Forecasts of Ground Level Space Weather in the UK: Evaluating Performance and Limitations

Space Weather, Volume 22, Issue 11, November 2024.
Abstract Geomagnetically Induced Currents (GICs) are a severe space weather hazard, driven through coupling between the solar wind and magnetosphere. GICs are rarely measured directly, instead the ground magnetic field variability is often used as a proxy.
A. W. Smith, I. J. Rae, C. Forsyth, J. C. Coxon, M.‐T. Walach, C. J. Lao, D. S. Bloomfield, S. A. Reddy, M. K. Coughlan, A. Keesee, S. Bentley   +10 more
wiley   +1 more source

Obtaining High‐Resolution Magnetic Records From Speleothems Using Magnetic Microscopy

Geochemistry, Geophysics, Geosystems, Volume 25, Issue 10, October 2024.
Abstract Speleothems are mineral deposits capable of recording detrital and/or chemical remanent magnetization at annual timescales. They can offer high‐resolution paleomagnetic records of short‐term variations in Earth's magnetic field, crucial for understanding the evolution of the dynamo.
Cauê S. Borlina, Eduardo A. Lima, Joshua M. Feinberg, Plinio Jaqueto, Ioan Lascu, Ricardo I. F. Trindade, Eric Font, Elisa M. Sánchez‐Moreno, Luca Antonio Dimuccio, Yusuke Yokoyama, Josep M. Parés, Benjamin P. Weiss, Jeffrey A. Dorale   +12 more
wiley   +1 more source

Research on geomagnetic secular variation of China and surrounding areas based on the Geomagnetic Virtual Observatories

Earth and Planetary Physics
The Low Earth Orbit (LEO) geomagnetic satellites provide a large number of high-precision measurements, which are crucial for researching the Secular Variation (SV) of the geomagnetic field.
Jiang Li, Bin Chen
doaj   +1 more source

A Statistical Study of the Properties of, and Geomagnetic Responses to, Large, Rapid Southward Turnings of the Interplanetary Magnetic Field

Journal of Geophysical Research: Space Physics, Volume 129, Issue 9, September 2024.
Abstract The interplanetary magnetic field (IMF) north‐south component, Bz, plays a crucial role in the interaction between the solar wind and the Earth's magnetosphere. We analyze 98 intervals in which Bz changed from >3 nT to <−3 nT in 5 min and for which these rapid southward turnings (STs) were surrounded by consistently northward or southward IMF.
Chiara Lazzeri, Andrey Samsonov, Colin Forsyth, Graziella Branduardi‐Raymont, Yulia V. Bogdanova   +4 more
wiley   +1 more source

On the Association of Substorm Identification Methods

Journal of Geophysical Research: Space Physics, Volume 129, Issue 9, September 2024.
Abstract Substorms are a rapid release of energy that is redistributed throughout the magnetosphere‐ionosphere system, resulting in many observable signals, such as enhancements in the aurora, energetic particle injections, and ground magnetic field perturbations.
C. J. Lao, C. Forsyth, M. P. Freeman, A. W. Smith, M. K. Mooney   +4 more
wiley   +1 more source

The SGR 1806-20 magnetar signature on the Earth's magnetic field

, 2007
SGRs denote ``soft $\gamma$-ray repeaters'', a small class of slowly spinning neutron stars with strong magnetic fields. On 27 December 2004, a giant flare was detected from magnetar SGR 1806-20.
Alexandrescu, Balasis, Balasis, Boggs, Campbell, Duncan, G. Balasis, Hulot, Hurley, Hurley, Inan, Inan, Inan, Kumar, Lühr, M. Mandea, Maus, Mazets, Mazets, Parrot, Schwartz, Terasawa, Torrence, Tyler   +23 more
core   +1 more source