Earthquake Seismic Moment, Rupture Radius, and Stress Drop From P-Wave Displacement Amplitude Versus Time Curves

Zollo, Aldo; Nazeri, Sahar; Colombelli, Simona

doi:10.1109/tgrs.2021.3119909

Cited by 10 publications

(24 citation statements)

References 37 publications

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“…Because of analysis constraints, such as data quality, the source parameters for only 52 earthquakes have been obtained from the initial dataset consisting of 85 events. Also, to better understand how the methodology and the assumed circular rupture model depend on the seismic region/regime and the focal mechanism of the causative fault, the measurements of this work are compared with those of Zollo et al, [27] for Central Italy and Japan seismic zones. The main conclusion of our study area:…”

Section: Discussionmentioning

confidence: 99%

“…This figure also represents the available historical events [39] with yellow hexagons at each segment. [27]). The t curve to the LPDT curve (red curve) is shown with the black dotted line.…”

Section: Discussionmentioning

confidence: 99%

“…In this study, we have implemented a time-domain and average-based method called "LPDT" which analyzes the P-wave signals recorded by local accelerometer/velocimeter network sensors deployed in the near-source, far-field range of the earthquakes [27]. This method uses a p-wave displacement waveform integrated from the vertical component of the input data, i.e., acceleration or velocity.…”

Section: Methodsmentioning

confidence: 99%

“…Independent to the rupture model, determination of the seismic moment (M0) relates to the area underneath the source time function (STF). In an elastic, homogeneous, and half-space Earth model, and from the far-field P-wave displacement radiated from a point-source rupture, M0 is calculated via following formula [27][28]34]:…”

Section: Methodsmentioning

confidence: 99%

“…Here, the earthquake source parameters (moment magnitude, source duration, source dimension, and average stress drop) are determined implementing a parametric modelling technique named "LPDT-method" (logarithm of the P-wave displacement amplitude vs time) to the near-source strong motion data [25][26][27][28][29]. The method is based on building and modeling the time-evolutive Pwave displacement amplitude in a progressively expanded time window after the first P-wave onset.…”

Section: Introductionmentioning

confidence: 99%

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Earthquake Source Parameters in Zagros Region (Iran) From the Time -Evolutive P-wave Displacement

Nazeri

Abdi

Ismail

et al. 2023

Preprint

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The rupture process of the recent moderate-to-large earthquakes in the Zagros area along the Iran plateau is investigated by analysing the strong motion data provided by the Iranian Building and Housing Research Centre (BHRC). The selected dataset includes the largest and deadliest 2017 Mw 7.3, Iran-Iraq (Ezgeleh) earthquake. The earthquake source parameters (moment magnitude, rupture duration and length, average slip, and static stress drop) are determined using a time-domain, parametric modelling technique based on the time evolution of the P-wave displacement signals. The earthquake source parameters are calculated from simulated triangular moment-rate functions assuming the circular source models for a constant rupture velocity. The anelastic attenuation effect is modelled through the independent frequency-Q parameter ranging from 50 to 200 and accounted for by a post-processing procedure that retrieves the attenuation-corrected, moment-rate triangular shape. Results show that the average static stress-drop with different \({Q}_{P}\), varies between < Δ𝜎>=0.9 (0.7 − 1.2) MPa and < Δ𝜎>=1.6 (1.2 − 2.0) MPa. Assuming a circular rupture model for Ezgeleh earthquake, we estimate a moment magnitude of 6.9, rupture duration of 7 seconds, source radius of 16 km, average slip of about 2 m and static stress drop of 3.4 MPa.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Earthquake Source Parameters in Zagros Region (Iran) From the Time -Evolutive P-wave Displacement

Nazeri

Abdi

Ismail

et al. 2023

Preprint

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An Impact-Based and Time-Evolutive Earthquake Early Warning Method

Zollo

Colombelli

Caruso³

et al. 2022

Preprint

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Here we propose a methodology for Earthquake Early Warning able to issue the alert based on the real-time estimation of the epicentral area where a peak ground Intensity measure is expected to exceed a user-set ground shaking level. The method provides in output a P-wave-based, timeevolutive "early" shake map. It combines the Peak Ground Velocity (PGV) predictions available from the observed P-wave amplitudes and from the region-specific Ground Motion Prediction Equation (GMPE), using progressively updated estimates of earthquake location and magnitude.The P-wave displacement, velocity and acceleration amplitudes are jointly measured on a progressively expanded P-wave time window while the earthquake location and magnitude are evaluated using the first P-arrival time and displacement amplitudes at near source stations. A retrospective analysis of the 2016, Mw 6.5 Central Italy earthquake records shows that depending on the network density and spatial source coverage, the method naturally accounts for effects related to the earthquake rupture directivity and spatial variability of strong ground motion related to crustal wave propagation and site amplification. Within 1.5 sec since the first alert (5.15 sec after the origin time), the simulated performance of the system in predicting the event ground

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EASOt-AP: An open-source MATLAB package to estimate the seismic moment, rupture radius, and stress-drop of earthquakes from time-dependent P-wave displacements

Nazeri

Zollo

2023

Computers & Geosciences

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Earthquake Seismic Moment, Rupture Radius, and Stress Drop From P-Wave Displacement Amplitude Versus Time Curves

Cited by 10 publications

References 37 publications

Earthquake Source Parameters in Zagros Region (Iran) From the Time -Evolutive P-wave Displacement

Earthquake Source Parameters in Zagros Region (Iran) From the Time -Evolutive P-wave Displacement

An Impact-Based and Time-Evolutive Earthquake Early Warning Method

EASOt-AP: An open-source MATLAB package to estimate the seismic moment, rupture radius, and stress-drop of earthquakes from time-dependent P-wave displacements

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