Dependence of earthquake recurrence times and independence of
... scale, in comparison with a Poisson process (given by f exponential, i.e., γ = a = δ = 1). In fact, clustering is more clearly identified by looking at the hazard rate function (containing the same information than the probability density), which shows a high value for short recurrence times and dec ...
... scale, in comparison with a Poisson process (given by f exponential, i.e., γ = a = δ = 1). In fact, clustering is more clearly identified by looking at the hazard rate function (containing the same information than the probability density), which shows a high value for short recurrence times and dec ...
chapter 3 - Geophile.net
... * Wood structures are flexible and will not generally collapse. 28. In some buildings, often a single floor will collapse. What characteristics of a building will lead to such a single-floor collapse? * Weak floors: Too many windows on a certain floor Garages or storefronts on the ground floor 29. I ...
... * Wood structures are flexible and will not generally collapse. 28. In some buildings, often a single floor will collapse. What characteristics of a building will lead to such a single-floor collapse? * Weak floors: Too many windows on a certain floor Garages or storefronts on the ground floor 29. I ...
Juan de Fuca slab geometry and its relation to Wadati
... locations and regional seismic velocity studies. We use the model to separate earthquakes that occur in the Cascadia forearc from those that occur within the underlying Juan de Fuca plate and thereby reveal previously obscured details regarding the spatial distribution of earthquakes. Seismicity wit ...
... locations and regional seismic velocity studies. We use the model to separate earthquakes that occur in the Cascadia forearc from those that occur within the underlying Juan de Fuca plate and thereby reveal previously obscured details regarding the spatial distribution of earthquakes. Seismicity wit ...
Subsidence in the Lower Hutt Valley and the interplay between
... ABSTRACT: In 1855, rupture on the Wairarapa Fault resulted in uplift of 1.2-1.5 m in the Lower Hutt Valley. This historical event has coloured expectations of what will happen in the next major Wellington region earthquake. However, geological data from the Hutt Valley provide compelling evidence th ...
... ABSTRACT: In 1855, rupture on the Wairarapa Fault resulted in uplift of 1.2-1.5 m in the Lower Hutt Valley. This historical event has coloured expectations of what will happen in the next major Wellington region earthquake. However, geological data from the Hutt Valley provide compelling evidence th ...
IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) e-ISSN: 2278-1684,p-ISSN: 2320-334X,
... been shown to be the epicentral area of some of the major earthquakes in the past. Although the ancient record do not specify the earthquake epicenter by giving coordinates in terms of latitude and longitude. It is difficult to figure out whether these cities were directly hit by earthquakes. Howeve ...
... been shown to be the epicentral area of some of the major earthquakes in the past. Although the ancient record do not specify the earthquake epicenter by giving coordinates in terms of latitude and longitude. It is difficult to figure out whether these cities were directly hit by earthquakes. Howeve ...
Generalized statistical mechanics approaches to earthquakes and
... relation implies that the aftershock production rate decays as power law with time [3]. Furthermore, the earthquake frequency–magnitude relationship is found to be applicable over a wide range of earthquake sizes both globally and locally and even down to the laboratory scale [4–6]. Short- and long- ...
... relation implies that the aftershock production rate decays as power law with time [3]. Furthermore, the earthquake frequency–magnitude relationship is found to be applicable over a wide range of earthquake sizes both globally and locally and even down to the laboratory scale [4–6]. Short- and long- ...
Seismological structure of subduction zones and its implications for
... slab. The mantle wedge low-V /low-Q zones also exhibit strong seismic anisotropy. These results suggest that arc magmatic systems are not limited to the near-surface areas, but are related to the deep processes, such as the convective circulation in the mantle wedge and dehydration reactions in the ...
... slab. The mantle wedge low-V /low-Q zones also exhibit strong seismic anisotropy. These results suggest that arc magmatic systems are not limited to the near-surface areas, but are related to the deep processes, such as the convective circulation in the mantle wedge and dehydration reactions in the ...
Significant technical advances in broadband seismic stations in the
... distributed all along the Lesser Antilles subduction zone, from Grenadine islands in the south, to St Barthélémy in the north (Fig. 1), and from Eastern Guadeloupe in the west to La Désirade in the east. Together with the other networks (CU, NA, G and TR), the WI stations complete the coverage of th ...
... distributed all along the Lesser Antilles subduction zone, from Grenadine islands in the south, to St Barthélémy in the north (Fig. 1), and from Eastern Guadeloupe in the west to La Désirade in the east. Together with the other networks (CU, NA, G and TR), the WI stations complete the coverage of th ...
1992 Cape Mendocino earthquakes
The 1992 Cape Mendocino earthquakes (or 1992 Petrolia earthquakes) occurred along the Lost Coast of Northern California on April 25 and 26. The three largest events were the M7.2 thrust mainshock that struck near the unincorporated community of Petrolia midday on April 25 and two primary strike-slip aftershocks measuring 6.5 and 6.6 that followed early the next morning. The sequence encompassed both interplate and intraplate activity that was associated with the Mendocino Triple Junction, a complex system of three major faults (including the Cascadia subduction zone, San Andreas Fault, and Mendocino Fracture Zone) that converge near Cape Mendocino. The total number of aftershocks that followed the events exceeded 2,000.The three shocks damaged and destroyed homes and businesses in Humboldt County and injured 356 people, but the single largest loss was due to a post-earthquake fire that consumed a business center in Scotia. Accelerometers that had been in place in the Cape Mendocino area since the late 1970s recorded the event and the readings were moderate to strong, with the exception of the instruments closest to the epicenter, which went off scale a few seconds into the recording. No surface ruptures were present in the epicentral area, but landslides closed roads and railroad tracks for at least a week while cleanup took place. Also discovered was about 1 m (3 ft 3 in) of coastal uplift near Cape Mendocino and Punta Gorda.As the largest earthquake in California since the 1989 Loma Prieta event several years earlier, the mainshock caused a non-destructive tsunami that quickly reached the coast, and eventually Alaska and Hawaii several hours later. The tsunami was significant not because of its run-up, but because of the speed with which it reached the coast and for how long the waves persisted. Other strong earthquakes have affected the same area, with some that were clearly associated with the (interplate) Mendocino Fracture Zone, and others (like the two shocks on April 26) were intraplate earthquakes that ruptured within the Gorda Plate, but events that are unequivocally associated with the Cascadia subduction zone are very infrequent.