Results 81 to 90 of about 14,965 (253)

Spatial Covariability of Extreme Floods Over the Coterminous United States: Co‐Dependency Measures and Their Statistical Significance

Water Resources Research, Volume 62, Issue 1, January 2026.
Abstract Understanding the spatial structure of extreme floods is critical both for reliable design flood estimation and for coordinated development of regional response and flood mitigation strategies. Yet, analysis of rare, high‐magnitude floods is challenged by the limited sample size.
Kichul Bae, Jeongwoo Hwang, A. Sankarasubramanian   +2 more
wiley   +1 more source

Magnetic properties of the Old Crow tephra: Identification of a complex iron titanium oxide mineralogy

, 2004
International audience[1] The mineralogy and grain-size distribution of the Fe-Ti oxide population of the Old Crow tephra bed, outcropping at the Halfway House loess deposit in central Alaska, are characterized through multiple low-and high-temperature ...
Ade-Hall, Arai, Arai, Begét, Begét, Begét, Berger, Brown, Day, Fournelle, France Lagroix, Froese, Frost, Grommé, Hamilton, Hoffman, Hunt, Ishikawa, Ishikawa, Jackson, Kakol, Kakol, Lagroix, McEnroe, Mike J. Jackson, Miller, Moskowitz, Moskowitz, Mullins, Nagata, Nord, Néel, Oches, Plafker, Preece, Radhakrishnamurthy, Rancourt, Shirane, Subir K. Banerjee, Westgate, Westgate, Westgate, Worm, Özdemir   +43 more
core   +3 more sources

Incorporating Non‐Seismicity Precursors Into Earthquake Probabilistic Forecasting Model

Geophysical Research Letters, Volume 52, Issue 24, 28 December 2025.
Abstract To test whether geophysical anomalies contribute to earthquake forecasts beyond the inherent clustering effects in seismicity, we develop a self and external excitation point‐process model by incorporating anomalies into the temporal Epidemic‐Type Aftershock Sequence (ETAS) model.
Yiqun Zhang, Peng Han, Hongyan Chen, Chengxiang Zhan, Yuanyuan Niu, Jiancang Zhuang, Kaiguang Zhu   +6 more
wiley   +1 more source

Robustness of characteristics of the Matuyama-Brunhes geomagnetic field reversal found in global models

Frontiers in Earth Science
Paleomagnetic data enables the global reconstruction of the geomagnetic field, allowing the investigation of significant events like polarity reversals and excursions.
Ahmed Nasser Mahgoub, Ahmed Nasser Mahgoub, Monika Korte, Sanja Panovska, Maximilian Schanner   +4 more
doaj   +1 more source

Paleomagnetic Evidence for Post-Devonian Displacement of the Avalon Platform (Newfoundland) [PDF]

, 1982
The possibility that the Avalon Platform, where the Avalonian lithotectonic belt is best developed, was involved in late Paleozoic displacement was tested by paleomagnetic study of red sandstones of the Upper Devonian Terrenceville Formation of eastern ...
Kent, Dennis V.
core   +2 more sources

Quickly erupted volcanic sections of the Steens Basalt, Columbia River Basalt Group: Secular variation, tectonic rotation, and the Steens Mountain reversal

Geochemistry, Geophysics, Geosystems, 2008
The Steens Basalt, now considered part of the Columbia River Basalt Group (CRBG), contains the earliest eruptions of this magmatic episode. Lava flows of the Steens Basalt cover about 50,000 km2 of the Oregon Plateau in sections up to 1000 m thick.
Nicholas A. Jarboe, Robert S. Coe, Paul R. Renne, Jonathan M. G. Glen, Edward A. Mankinen   +4 more
doaj   +1 more source

Slow True Polar Wander Around Varying Equatorial Axes Since 320 Ma

AGU Advances
True polar wander (TPW), the rotation of the solid Earth relative to the spin axis, is driven by changes in the Earth's moment of inertia induced by mantle convection and may have influenced past climate and life. Long‐term TPW is typically inferred from
Bram Vaes, Douwe J. J. vanHinsbergen
doaj   +1 more source

Statistics of the geomagnetic secular variation for the past 5Ma [PDF]

A new statistical model is proposed for the geomagnetic secular variation over the past 5Ma. Unlike previous models, the model makes use of statistical characteristics of the present day geomagnetic field.
Constable, C. G., Parker, R. L.
core   +1 more source

A New View of Long-Term Geomagnetic Field Secular Variation

Frontiers in Earth Science, 2018
This study carries out a statistical analysis of high-resolution PSV records for the last ~70 ka from three different regions of the Earth. We consider directional and intensity variability in each region on time scales of 103-105 years in order to ...
Steve P. Lund
doaj   +1 more source

Deccan volcanism at the Cretaceous-Tertiary boundary [PDF]

The accuracy with which one can claim that Deccan trap volcanism occurred at the Cretaceous-Tertiary boundary (KTB) over a very short time interval is of key importance in deciding whether a volcanic origin of the KTB events should be taken seriously. In
Besse, J., Courtillot, V., Vandamme, D.
core   +1 more source