Long-period surface motion of the multipatch Mw9.0 Tohoku-Oki earthquake

Psimoulis, Panos; Houlié, Nicolas; Michel, Clotaire; Meindl, Michael; Rothacher, M.

doi:10.1093/gji/ggu302

Cited by 19 publications

(21 citation statements)

References 78 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Considering that the closest seismic records were onshore at ∼75 km from the epicenter, the high-frequency ground motions were already attenuated when reaching the coastline of Japan. Psimoulis et al (2014) showed that the 5% damped pseudospectral acceleration (PSA) at 3 s retrieved with GPS was the same as that retrieved with the accelerometric network, which is a further indication of the capability of GPS data for such events. Because the study of Psimoulis et al (2014) was based on 1 Hz, it was unclear how much of PGV could have been captured by the GNSS Earth Observation Network System (GEO-NET) running at a higher sampling rate.…”

Section: Introductionmentioning

confidence: 69%

“…Psimoulis et al (2014) showed that the 5% damped pseudospectral acceleration (PSA) at 3 s retrieved with GPS was the same as that retrieved with the accelerometric network, which is a further indication of the capability of GPS data for such events. Because the study of Psimoulis et al (2014) was based on 1 Hz, it was unclear how much of PGV could have been captured by the GNSS Earth Observation Network System (GEO-NET) running at a higher sampling rate. In the present study, we investigate whether high-rate GPS records are able to, and how reliably they can, quantify "true" broadband PGV.…”

Section: Introductionmentioning

confidence: 69%

“…instance, exhibit tilting (Psimoulis et al, 2014) that impacts the estimation of ground motion even for periods close to 3 s. The comparison with the FAS model for earthquake ground motion shows that, for instance, we expect a magnitude 6.5 to be well recorded by GPS on both horizontal and vertical components at periods larger than 2 s at 20 km distance in Switzerland (Fig. 1), whereas a magnitude 5 event cannot be recorded at this epicentral distance with current technology and processing strategies.…”

Section: Gps Noise Levels Noise Of Real-time Gps-ppp Time Series Is mentioning

confidence: 99%

“…1 Hz GPS recordings have been used to detect motions of the Earth's surface associated with seismic-wave propagation Houlié et al, 2011;Kaloop and Rabah, 2016), for earthquake early warning (Allen and Ziv, 2011;Bock et al, 2011), to invert for coseismic slip of large (M w > 6) events (Miyazaki et al, 2004;Miyazaki and Larson, 2008;Rhie et al, 2009;Houlié et al, 2014), to constrain seismic moment magnitude (Melgar et al, 2015), and to record the Earth's normal modes (Mitsui and Heki, 2012), or simply coseismic offsets . Psimoulis et al (2014) showed that it is possible to establish maximum ground velocity (MGV) maps at long periods (T > 3 s) using high sampling rate GPS data collected during the 2011 Tohoku-Oki megathrust event. Some deep basins in Japan with a fundamental period of 3 s or more showed large amplifications of the long-period ground motion during the Tohoku-Oki event, which are not taken into account by commonly used high-frequency amplification proxies such as V S30 .…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The Potential of High‐Rate GPS for Strong Ground Motion Assessment

Michel¹,

Kelevitz²,

Houlié³

et al. 2017

Bulletin of the Seismological Society of America

Self Cite

View full text Add to dashboard Cite

We show that high-rate Global Positioning System (GPS) can have a vital role to play in near-real-time monitoring of potentially destructive earthquakes. We do this by investigating the potential of GPS in recording strong ground motions from earthquakes in Switzerland and Japan. The study uses finite-fault stochastic groundmotion simulation based on Fourier amplitude spectra and duration models previously developed for both countries, allowing comparisons in terms of both Fourier and timedomain characteristics (here, the peak ground velocity [PGV]).We find that earthquakes of magnitude M w > 5:8 can be recorded by GPS in real time at 10 km distance, that is, their Fourier spectrum exceeds the noise of the instruments enough to be used in strong-motion seismology. Postprocessing of GPS time series lowers the noise and can improve the minimum observable magnitude by 0.1-0.2. As GPS receivers can record at higher rates (> 10 Hz), we investigate which sampling rate is sufficient to optimally record earthquake signals and conclude that a minimum sampling rate of 5 Hz is recommended. This is driven by recording events at short distances (below 10 km for magnitude 6 events and below 30 km for magnitude 7 events).Furthermore, the maximum ground velocity derived from GPS is compared with the actual PGV for synthetic signals from the stochastic simulations and the 2008 M w 6.9 Iwate earthquake. The proposed model, confirmed by synthetic and empirical data, shows that a reliable estimate of PGV for events of about magnitude 7 and greater can be basically retrieved by GPS in real time and could be included, for instance, in ShakeMaps for aiding postevent disaster management.

show abstract

Section: Introductionmentioning

confidence: 69%

Section: Introductionmentioning

confidence: 69%

Section: Gps Noise Levels Noise Of Real-time Gps-ppp Time Series Is mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Potential of High‐Rate GPS for Strong Ground Motion Assessment

Michel¹,

Kelevitz²,

Houlié³

et al. 2017

Bulletin of the Seismological Society of America

Self Cite

View full text Add to dashboard Cite

show abstract

“…Also, the Geospatial Information Authority of Japan (GSI) uses over 1200 continuously observing GPS receivers, known as GPS Earth Observation Network (GEONET), covering Japan's land area with an average distance of about 20 km between neighboring points [72,73].…”

Section: Methodology For Assessment Of Pppmentioning

confidence: 99%

Recent Advances of Structures Monitoring and Evaluation Using GPS-Time Series Monitoring Systems: A Review

Kaloop

Elbeltagi

et al. 2017

IJGI

View full text Add to dashboard Cite

This paper presents the recent development in Structural Health Monitoring (SHM) applications for monitoring the dynamic behavior of structures using the Global Positioning Systems (GPS) technique. GPS monitoring systems for real-time kinematic (RTK), precise point positioning (PPP) and the sampling frequency development of GPS measurements are summarized for time series analysis. Recent proposed time series GPS monitoring systems, errors sources and mitigation, as well as system analysis and identification, are presented and discussed.

show abstract

Real‐Time Magnitude Characterization of Large Earthquakes Using the Predominant Period Derived From 1 Hz GPS Data

Psimoulis

Houlié

Behr

2018

Geophysical Research Letters

Self Cite

View full text Add to dashboard Cite

Earthquake early warning (EEW) systems' performance is driven by the trade‐off between the need for a rapid alert and the accuracy of each solution. A challenge for many EEW systems has been the magnitude saturation for large events (MW > 7) and the resulting underestimation of seismic moment magnitude. In this study, we test the performance of high‐rate (1 Hz) GPS, based on seven seismic events, to evaluate whether long‐period ground motions can be measured well enough to infer reliably earthquake predominant periods. We show that high‐rate GPS data allow the computation of a GPS‐based predominant period (τg) to estimate lower bounds for the magnitude of earthquakes and distinguish between large (MW > 7) and great (MW > 8) events and thus extend the capability of EEW systems for larger events. It has also identified the impact of the different values of the smoothing factor α on the τg results and how the sampling rate and the computation process differentiate τg from the commonly used τp.

show abstract

Long-period surface motion of the multipatch Mw9.0 Tohoku-Oki earthquake

Cited by 19 publications

References 78 publications

The Potential of High‐Rate GPS for Strong Ground Motion Assessment

The Potential of High‐Rate GPS for Strong Ground Motion Assessment

Recent Advances of Structures Monitoring and Evaluation Using GPS-Time Series Monitoring Systems: A Review

Real‐Time Magnitude Characterization of Large Earthquakes Using the Predominant Period Derived From 1 Hz GPS Data

Contact Info

Product

Resources

About