A magnitude 8.0. earthquake destroyed 90 percent of the city of Pisco, Peru on August 16, 2007. The event killed 595 people, while another 318 were missing. Tsunami waves were observed locally, off the shore of Chile, and as far away as New Zealand.
In a study published in the Geophysical Journal International, scientists from the University of Miami's Rosenstiel School of Marine and Atmospheric Science, in collaboration with scientists from the University of Oxford (U.K.) have analyzed data on this earthquake and its impact on regional topography. Using InSAR-based geodetic data and teleseismic data, the scientists were able to use satellite images to identify details of this major plate boundary event.
"Unfortunately, historical earthquakes in Central Peru show a complex repeat pattern making it difficult to identify which area will be affected in the future," said Rosenstiel School Postdoctoral Fellow and Principal Investigator Dr. Juliet Biggs. "The convergence of the Nazca and the South American plates is slowly building the Andes, but the relationship between great earthquakes and mountain building processes is still unclear."
Intriguingly, models developed as a result of this event in 2007 demonstrated no upper lifting of the region after this major earthquake. Long-term uplift of the upper plate must either occur aseismically or as 'slow earthquakes' during the interseismic or postseismic part of the earthquake cycle.
Support for the project came from the U.S. National Science Foundation. The earthquake confirmed a common feature for earthquakes in central Peru: maximum intensity and damage occur few tens of kilometers south of the epicenter. This is a key observation for disaster management and tsunami prediction.
"Visiting Peru immediately after the earthquake together with fellow researcher Kim Outerbridge provided us with a desolating picture of the affected region, but it was critically important for data-gathering," Biggs said.
The collaboration with Dr. Edmundo Norabuena, a former graduate from the Rosenstiel School now at Instituto Geofísico del Perú, to deploy GPS equipment in the region permitted collection of essential data, which will be the subject of a new study. This will provide details on the movement generated deep inside the earth after the earthquake, which is another crucial part of the puzzle in terms of our understanding of the recurrence intervals of major earthquakes.
Founded in the 1940's, the University of Miami's Rosenstiel School of Marine & Atmospheric Science has grown into one of the world's premier marine and atmospheric research institutions. Offering dynamic interdisciplinary academics, the Rosenstiel School is dedicated to helping communities to better understand the planet, participating in the establishment of environmental policies, and aiding in the improvement of society and quality of life.
Barbra Gonzalez | EurekAlert!
Oasis of life in the ice-covered central Arctic
24.10.2016 | Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung
Receding glaciers in Bolivia leave communities at risk
20.10.2016 | European Geosciences Union
Terahertz excitation of selected crystal vibrations leads to an effective magnetic field that drives coherent spin motion
Controlling functional properties by light is one of the grand goals in modern condensed matter physics and materials science. A new study now demonstrates how...
Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.
"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...
In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.
A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...
By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.
"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...
COMPAMED has become the leading international marketplace for suppliers of medical manufacturing. The trade fair, which takes place every November and is co-located to MEDICA in Dusseldorf, has been steadily growing over the past years and shows that medical technology remains a rapidly growing market.
In 2016, the joint pavilion by the IVAM Microtechnology Network, the Product Market “High-tech for Medical Devices”, will be located in Hall 8a again and will...
14.10.2016 | Event News
14.10.2016 | Event News
12.10.2016 | Event News
24.10.2016 | Earth Sciences
24.10.2016 | Life Sciences
24.10.2016 | Physics and Astronomy