[1] We examine five different methods to estimate an earthquake’s magnitude using only P wave data for use in earthquake early warning systems. We test two input parameters: the maximum predominant period of the P wave (τp) and the displacement amplitude of the P wave’s vertical component (Pd). We apply our algorithms to 174 earthquakes 3.0<M< 8.0 from California and Japan that have also been u...

Frictional melting and fluid pressurization can play a key role in rupture dynamics of large earthquakes. For faulting under frictional stress ar, the temperature increases with cr.r and the earthquake magnitude, Mw. If the thickness of the heated zone, w, is of the order of a few mm, then, even for a modest a1, the temperature rise, ll.T, would exceed 1000° for earthquakes with Mw=5 to 6, and ...

[1] In the paper “Scaling of small repeating earthquakes explained by interaction of seismic and aseismic slip in a rate and state fault model" by Ting Chen and Nadia Lapusta (Journal of Geophysical Research, 114, B01311, doi:10.1029/ 2008JB005749, 2009), Figure 8 had an incorrect label for the horizontal axis and hence an incorrect caption. The error does not change the conclusions of the stud...

[1] We estimate the slip distribution from the MW 8.1 Solomon Islands earthquake in 2007, from two post-seismic surveys measuring uplifted coral and submerged coastal features. The occurrence of islands extremely proximal to the trench and nucleation of rupture allowed for the collection of unprecedented coseismic deformation dataset along a large megathrust earthquake. Using data from the two ...

The Region-Time-Length (RTL) algorithm has been applied to different instrumental catalogues to detect seismic quiescence before medium-to-large earthquakes in Italy in the last two decades. RTL performances are sensitive to the choice of spatial and temporal parameters. The method for automatic parameters selection developed by Chen and Wu has been applied to 12 Italian earthquakes with magnit...

Objective. Relationship, vitality, and conscientiousness are three fundamental virtues that have been recently identified as important individual differences to health, well being, and positive development. This cross-sectional study attempted to explore the relationship between the three constructs and post-traumatic growth (PTG) in three directions, including indirect trauma samples without p...

The possibility that the Earth’s tides are a triggering factor of Vrancea subcrustal earthquakes is investigated in the first part of this paper. A possible correlation between Vrancea subcrustal earthquakes and geomagnetic jerks is demonstrated in the second part. The last part of the paper presents a number of results concerning a possible relationship between the regularities of strong Vranc...

Histories of vertical crustal motions at convergent margins offer fundamental insights into the relationship between interplate slip and permanent deformation. Moreover, past abrupt motions are proxies for potential tsunamigenic earthquakes and benefit hazard assessment. Well-dated records are required to understand the relationship between past earthquakes and Holocene vertical deformation. He...