Results 1 to 10 of about 5,746 (182)

Observations of a new foreshock region upstream of a foreshock bubble's shock [PDF]

Geophysical Research Letters, 2016
Earth's foreshock is a region within the solar wind upstream of Earth's bow shock filled with backstreaming solar wind particles reflected at the shock.
Terry Liu, Heli Hietala, Vassilis Angelopoulos   +2 more
exaly   +3 more sources

Traveling Foreshocks and Transient Foreshock Phenomena [PDF]

Journal of Geophysical Research: Space Physics, 2017
AbstractWe use the multispacecraft capabilities of the Cluster and Time History of Events and Macroscale Interactions during Substorms (THEMIS) missions to show that two types of foreshock may be detected in spacecraft data. One is the global foreshock that appears upstream of the Earth's quasi‐parallel bow shock under steady or variable interplanetary
Primoz Kajdic, Nick Omidi, Diana Rojas-Castillo   +2 more
exaly   +4 more sources

Irregular rupture process of the 2022 Taitung, Taiwan, earthquake sequence [PDF]

Scientific Reports, 2023
In September 2022, two destructive earthquakes of moment magnitude (M w) 6.6 (foreshock) and 7.1 (mainshock) occurred in Taitung County, south-eastern Taiwan.
Yuji Yagi, Ryo Okuwaki, Bogdan Enescu, Junjie Lu   +3 more
doaj   +2 more sources

Foreshock migration preceding the 2016 Mw 7.0 Kumamoto earthquake, Japan

Geophysical Research Letters, 2016
We investigated the spatiotemporal evolution of an earthquake sequence following a series of large shallow intraplate earthquakes, including a Mw 6.2 foreshock and Mw 7.0 main shock, in the Kumamoto area of Kyushu, SW Japan.
Aitaro Kato, Jun'ichi Fukuda, Kazushige Obara   +2 more
exaly   +2 more sources

Pervasive Foreshock Activity Across Southern California [PDF]

Geophysical Research Letters, 2019
Foreshocks have been documented as preceding less than half of all mainshock earthquakes. These observations are difficult to reconcile with laboratory earthquake experiments and theoretical models of earthquake nucleation, which both suggest that ...
Daniel T. Trugman, Zachary E. Ross
doaj   +8 more sources

Relationship Between the 2019 Ridgecrest, California, M_W7.1 Earthquake and Its M_W6.4 Foreshock Sequence [PDF]

Entropy
The 2019 Ridgecrest MW7.1 earthquake has received significant attention due to its complex fault activity. It is also noticeable for its MW6.4 foreshock sequence.
Jianchang Zheng, Zhengshuai Zhang, Xiaohan Li   +2 more
doaj   +2 more sources

Mainshocks are aftershocks of conditional foreshocks: How do foreshock statistical properties emerge from aftershock laws [PDF]

Journal of Geophysical Research: Solid Earth, 2003
The inverse Omori law for foreshocks discovered in the 1970s states that the rate of earthquakes prior to a mainshock increases on average as a power law ~ 1/(t_c-t)^p' of the time to the mainshock occurring at t_c.
Abercrombie, Agnew, Agnès Helmstetter, Aki, Berg, Bowman, Bufe, Cagnetti, Console, Davis, Didier Sornette, Dodge, Enescu, Felzer, Gabrielov, Gabrielov, Gross, Guo, Hainzl, Helmstetter, Helmstetter, Huang, Ikegami, Imoto, Jaumé, Jean-Robert Grasso, Jones, Jones, Kagan, Kagan, Kagan, Kagan, Kagan, Keilis-Borok, Keilis-Borok, Keilis-Borok, Kisslinger, Kisslinger, Knopoff, Li, Lindh, Ma, Maeda, Michael, Mogi, Mogi, Molchan, Molchan, Molchan, Molchan, Narteau, Ogata, Ogata, Ogata, Omori, Omori, Page, Papazachos, Papazachos, Papazachos, Papazachos, Pelletier, Reasenberg, Reasenberg, Reasenberg, Rotwain, Sammis, Scholz, Shaw, Smith, Smith, Sornette, Sornette, Sornette, Sornette, Stephens, Suyehiro, Tajima, Utsu, von Seggern, Wu, Wyss, Yamanaka, Yamashina, Yamashita, Yamashita, Yamashita, Zhang, Zöller   +88 more
core   +9 more sources

ARTEMIS Observations of Foreshock Transients in the Midtail Foreshock

Geophysical Research Letters, 2020
AbstractForeshock transients such as hot flow anomalies (HFAs) are frequently observed in the dayside foreshock. They can disturb the local bow shock, magnetopause, and consequently the magnetosphere‐ionosphere system through dynamic pressure perturbations. Recent multipoint observations found that such perturbations can even propagate from the dayside
Chih-Ping Wang, Boyi Wang, Xueyi Wang
exaly   +2 more sources

Compound electron acceleration at planetary foreshocks. [PDF]

Nat Commun
AbstractShock waves, the interface of supersonic and subsonic plasma flows, are the primary region for charged particle acceleration in multiple space plasma systems, including Earth’s bow shock, which is readily accessible for in-situ measurements. Spacecraft frequently observe relativistic electron populations within this region, characterized by ...
Shi X, Artemyev A, Angelopoulos V, Liu T, Wilson Iii LB.   +4 more
europepmc   +6 more sources

Ion Acceleration Inside Foreshock Transients [PDF]

Journal of Geophysical Research: Space Physics, 2018
AbstractRecent observations upstream of Earth's bow shock have revealed that foreshock transients can not only accelerate solar wind ions by reflection at their upstream boundaries but may also accelerate ions inside them. Evidence for the latter comes from comparisons of ion spectra inside and outside the cores, and from evidence of leakage of ...
Terry Liu, San Lu, Vassilis Angelopoulos
exaly   +2 more sources