Advances in Geophysics, Vol. 49 by Renata Dmowska

By Renata Dmowska

The significantly acclaimed serialized overview magazine for almost fifty years, Advances in Geophysics is a hugely revered booklet within the box of geophysics. in view that 1952, every one quantity has been eagerly awaited, usually consulted, and praised by means of researchers and reviewers alike. Now in its forty ninth volumes, the Serial comprises a lot fabric nonetheless suitable today-truly an important booklet for researchers in all fields of geophysics.

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While their model was disputed by Leet (1951) and Wadati and Inouye (1953), Talandier (1966) and later Walker et al. (1992) and Walker and Bernard (1993) have supported the proposed correlation. However, such studies were mostly based on restricted datasets, and predated the large tsunamis of the 1990s, and in particular the “tsunami earthquakes” of 1992 (Nicaragua), 1994 (Java) and 1996 (Chimbote, Peru). ’s (1950) model precarious since we now understand that T waves can be generated by the very deepest events (Northrop, 1974; Okal, 2001b), while the generation of far-field tsunami energy is only mildly controlled by source depth for reasonably shallow earthquakes (h 70 km) (Ward, 1980; Okal, 1988).

A fascinating aspect of this event is that its recordings transcended the conventional boundaries of instrumentation. , 2005; Okal, 2007). In this context, and given the unique character of the earthquake, a description of its T waves is in order. The source characteristics of the Sumatra earthquake were investigated in the framework of the parameters γ and D introduced above. In this respect, we recall 52 OKAL Number Date Event Remarks 1 2 3 4 5 6 7 8 1966:052 1996:317 2001:174 2001:177 2001:186 2001:188 1997:288 1998:210 Chimbote, Peru Nazca, Peru Peru, Main shock Peru, First Large Aftershock Peru, Triggered Normal Faulting Peru, Largest Aftershock Ovalle, Chile Chile (Outboard, Intraplate) Tsunami Earthquake Snappy Snappy (Okal and Kirby, 2002) Snappy F IG .

The location of the new hydrophone station at Juan Fernandez Island (JF) is shown by the large circle and that of the Polynesian Seismic Network (RSP) by the open box. Adapted (re-labeled) from Fox et al. (2001). 5 Hz), otherwise poorly sampled due to anelastic attenuation of conventional teleseismic waves. However and as detailed below, for larger earthquakes, T waves are strongly affected by interference resulting from source finiteness, and their amplitude alone cannot be a good proxy for source size.

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