On the preparatory processes of the M6.6 earthquake of June 17th, 2000, in Iceland

Maurizio Bonafede; C. Ferrari; F. Maccaferri; R. Stefánsson

doi:10.1029/2007GL031391

On the preparatory processes of the M6.6 earthquake of June 17th, 2000, in Iceland

Maurizio Bonafede
, C. Ferrari
, F. Maccaferri
, R. Stefánsson

Háskólinn á Akureyri - University of Akureyri

University of Akureyri

Research output: Contribution to journal › Article › peer-review

Abstract

A model is proposed to explain the spatial distribution of Foreshocks of the June 17th 2000, Ms, 6.6 earthquake in the South Iceland Seismic Zone (SISZ) and the high stress drop of the mainshock. Fluids of magmatic origin, ascending at near-lithostatic pressure through a low permeability layer perturb the regional stress field, inhibiting fluid flow laterally, where a high strength asperity is left. The asperity is modeled as elastic, embedded within a medium with low effective rigidity. Regional stresses due to tectonic motions are perturbed by the presence of the asperity, enhancing the production of hydrofractures and foreshocks in the NW and SE quadrants and increasing considerably the shear stress within the asperity, leading to the NS striking mainshock.

Original language	English
Article number	L24305
Number of pages	5
Journal	Geophysical Research Letters
Volume	34
Issue number	24
DOIs	https://doi.org/10.1029/2007GL031391
Publication status	Published - 28 Dec 2007

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 1 No Poverty
SDG 2 Zero Hunger
SDG 3 Good Health and Well-being
SDG 4 Quality Education
SDG 5 Gender Equality
SDG 6 Clean Water and Sanitation
SDG 7 Affordable and Clean Energy
SDG 8 Decent Work and Economic Growth
SDG 9 Industry, Innovation, and Infrastructure
SDG 10 Reduced Inequalities
SDG 11 Sustainable Cities and Communities
SDG 12 Responsible Consumption and Production
SDG 13 Climate Action
SDG 14 Life Below Water
SDG 15 Life on Land
SDG 16 Peace, Justice and Strong Institutions
SDG 17 Partnerships for the Goals

Other keywords

Earthquake magnitude
Earthquakes
Foreshock
Fracture
Seismic zone
Tectonic motion

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10.1029/2007GL031391

Cite this

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title = "On the preparatory processes of the M6.6 earthquake of June 17th, 2000, in Iceland",

abstract = "A model is proposed to explain the spatial distribution of Foreshocks of the June 17th 2000, Ms, 6.6 earthquake in the South Iceland Seismic Zone (SISZ) and the high stress drop of the mainshock. Fluids of magmatic origin, ascending at near-lithostatic pressure through a low permeability layer perturb the regional stress field, inhibiting fluid flow laterally, where a high strength asperity is left. The asperity is modeled as elastic, embedded within a medium with low effective rigidity. Regional stresses due to tectonic motions are perturbed by the presence of the asperity, enhancing the production of hydrofractures and foreshocks in the NW and SE quadrants and increasing considerably the shear stress within the asperity, leading to the NS striking mainshock.",

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author = "Maurizio Bonafede and C. Ferrari and F. Maccaferri and R. Stef{\'a}nsson",

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doi = "10.1029/2007GL031391",

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T1 - On the preparatory processes of the M6.6 earthquake of June 17th, 2000, in Iceland

AU - Bonafede, Maurizio

AU - Ferrari, C.

AU - Maccaferri, F.

AU - Stefánsson, R.

PY - 2007/12/28

Y1 - 2007/12/28

N2 - A model is proposed to explain the spatial distribution of Foreshocks of the June 17th 2000, Ms, 6.6 earthquake in the South Iceland Seismic Zone (SISZ) and the high stress drop of the mainshock. Fluids of magmatic origin, ascending at near-lithostatic pressure through a low permeability layer perturb the regional stress field, inhibiting fluid flow laterally, where a high strength asperity is left. The asperity is modeled as elastic, embedded within a medium with low effective rigidity. Regional stresses due to tectonic motions are perturbed by the presence of the asperity, enhancing the production of hydrofractures and foreshocks in the NW and SE quadrants and increasing considerably the shear stress within the asperity, leading to the NS striking mainshock.

AB - A model is proposed to explain the spatial distribution of Foreshocks of the June 17th 2000, Ms, 6.6 earthquake in the South Iceland Seismic Zone (SISZ) and the high stress drop of the mainshock. Fluids of magmatic origin, ascending at near-lithostatic pressure through a low permeability layer perturb the regional stress field, inhibiting fluid flow laterally, where a high strength asperity is left. The asperity is modeled as elastic, embedded within a medium with low effective rigidity. Regional stresses due to tectonic motions are perturbed by the presence of the asperity, enhancing the production of hydrofractures and foreshocks in the NW and SE quadrants and increasing considerably the shear stress within the asperity, leading to the NS striking mainshock.

KW - Earthquake magnitude

KW - Earthquakes

KW - Foreshock

KW - Fracture

KW - Seismic zone

KW - Tectonic motion

UR - https://www.scopus.com/pages/publications/39549084343

U2 - 10.1029/2007GL031391

DO - 10.1029/2007GL031391

M3 - Article

SN - 0094-8276

VL - 34

JO - Geophysical Research Letters

JF - Geophysical Research Letters

IS - 24

M1 - L24305

ER -

On the preparatory processes of the M6.6 earthquake of June 17th, 2000, in Iceland

Abstract

UN SDGs

Other keywords

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