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Halldór Geirsson - Associate Professor
–
School of Engineering and Natural Sciences
Halldór Geirsson
Íslenska
Associate Professor
Geophysics
Location
Askja / N-323
Phone
5254490
8927715
Email
hgeirs [at] hi.is
Unit
Faculty of Earth Sciences
Website
https://notendur.hi.is/~hgeirs/
ORCID site
https://orcid.org/0000-0003-2056-1588
Research portal – Halldór Geirsson
Under construction throughout the autumn semester 2023
Courses 2022 - 2023
JEÐ201G - General Geophysics
JEÐ205F - Seminar on Current Geological Events
JAR242F - Presentation skills in earth sciences
JEÐ209F - Measurements and Models in Geodynamics
JEÐ505G - Current Crustal Movements
JAR107M - Introduction to the Geology of Iceland
JEÐ504M - Geophysical Exploration
JEÐ301G - Tectonics
Education
2014
,
Ph.D.
,
The Pennsylvania State University
,
Geophysics
2002
,
MS
,
University of Iceland
,
Geophysics
1999
,
BS
,
University of Iceland
,
Geophysics
Professional Experience
2015 -
2016,
Post-doc,
European center for Geodynamics and Seismology
2014 -
2014,
Post-doc,
The Pennsylvania State University
1999 -
2010,
Research Specialist,
The Icelandic Meteorological Office
1997 -
1998,
Research Assistant, summer jobs,
Iceland Energy Authority, Hydrological Survey
Published works
2022
Deformation and seismicity decline before the 2021 Fagradalsfjall eruption
Nature
2021
Temporal Seismic Velocity Changes During the 2020 Rapid Inflation at Mt. Þorbjörn‐Svartsengi, Iceland, Using Seismic Ambient Noise
Geophysical Research Letters
Strain Partitioning and Interseismic Fault Behavior Along the Caribbean‐South American Transform Plate Boundary
Tectonics
Ground Deformation After a Caldera Collapse: Contributions of Magma Inflow and Viscoelastic Response to the 2015–2018 Deformation Field Around Bárðarbunga, Iceland
Journal of Geophysical Research: Solid Earth
2020
Fault Creep and Strain Partitioning in Trinidad-Tobago: Geodetic Measurements, Models, and Origin of Creep
Tectonics
Injection-induced surface deformation and seismicity at the Hellisheidi geothermal field, Iceland
Journal of Volcanology and Geothermal Research
Geodynamics of Iceland and the signatures of plate spreading
Journal of Volcanology and Geothermal Research
2019
The effect of fluid compressibility and elastic rock properties on deformation of geothermal reservoirs
Geophysical Journal International
2018
Single-station seismo-acoustic monitoring of nyiragongo’s lava lake activity (D.R. Congo)
Frontiers in Earth Science
A Preseismic Strain Anomaly Detected Before M6 Earthquakes in the South Iceland Seismic Zone From GPS Station Velocities
Journal of Geophysical Research: Solid Earth
2017
Volcano-tectonic deformation in the Kivu Region, Central Africa: Results from six years of continuous GNSS observations of the Kivu Geodetic Network (KivuGNet)
Journal of African Earth Sciences
Deep magma accumulation at Nyamulagira volcano in 2011 detected by GNSS observations
Journal of African Earth Sciences
Multidimensional Small Baseline Subset (MSBAS) for volcano monitoring in two dimensions: Opportunities and challenges. Case study Piton de la Fournaise volcano
Journal of Volcanology and Geothermal Research
2016
Continuous subsidence in the Thingvellir rift graben, Iceland: Geodetic observations since 1967 compared to rheological models of plate spreading
Journal of Geophysical Research: Solid Earth
Assessing the likelihood and magnitude of volcanic explosions based on seismic quiescence
Earth and Planetary Science Letters
2015
Tectonic inversion in the Caribbean-South American plate boundary: GPS geodesy, seismology, and tectonics of the M
w
6.7 22 April 1997 Tobago earthquake
Tectonics
TThe 2012 August 27 M
w
7.3 El Salvador earthquake: Expression of weak coupling on the Middle America subduction zone
Geophysical Journal International
Stable and unstable phases of elevated seismic activity at the persistently restless Telica Volcano, Nicaragua
Journal of Volcanology and Geothermal Research
2014
Volcanic plume height correlated with magma-pressure change at Grímsvötn Volcano, Iceland
Nature Geoscience
Segmented lateral dyke growth in a rifting event at Bárðarbunga volcanic system, Iceland
Nature
Kinematics of the western Caribbean: Collision of the Cocos Ridge and upper plate deformation
Geochemistry, Geophysics, Geosystems
Multidisciplinary observations of the 2011 explosive eruption of Telica volcano, Nicaragua: Implications for the dynamics of low-explosivity ash eruptions
Journal of Volcanology and Geothermal Research
2013
New insights into volcanic activity from strain and other deformation data for the Hekla 2000 eruption
Journal of Volcanology and Geothermal Research
Seismicity accompanying the 1999 eruptive episode at telica volcano, nicaragua
Journal of Volcanology and Geothermal Research
2012
Volcano deformation at active plate boundaries: Deep magma accumulation at Hekla volcano and plate boundary deformation in south Iceland
Journal of Geophysical Research B: Solid Earth
2011
Localized uplift of Vatnajökull, Iceland: Subglacial water accumulation deduced from InSAR and GPS observations
Journal of Glaciology
Locking depth and slip-rate of the Húsavík Flatey fault, North Iceland, derived from continuous GPS data 2006-2010
Geophysical Journal International
Increased capture of magma in the crust promoted by ice-cap retreat in Iceland
Nature Geoscience
2010
Intrusion triggering of the 2010 Eyjafjallajökull explosive eruption
Nature
2 Katla and Eyjafjallajökull Volcanoes
Developments in Quaternary Science
Climate effects on volcanism: Influence on magmatic systems of loading and unloading from ice mass variations, with examples from Iceland
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
The 2008 May 29 earthquake doublet in SW Iceland
Geophysical Journal International
2009
Glacial rebound and plate spreading: Results from the first countrywide GPS observations in Iceland
Geophysical Journal International
Present day geodynamics in Iceland monitored by a permanent network of continuous GPS stations
Journal of Geodynamics
Recent deep-seated magmatic activity and the 2008 M6.3 earthquake: Applicability of ALOS/PALSAR in Iceland
European Space Agency, (Special Publication) ESA SP
A complex earthquake sequence captured by the continuous GPS network in SW Iceland
Geophysical Research Letters
2008
Multiple volcano deformation sources in a post-rifting period: 1989-2005 behaviour of Krafla, Iceland constrained by levelling, tilt and GPS observations
Journal of Volcanology and Geothermal Research
Seismic and geodetic insights into magma accumulation at Katla subglacial volcano, Iceland: 1999 to 2005
Journal of Geophysical Research: Solid Earth
Earthquake swarms at Upptyppingar, north-east Iceland: A sign of magma intrusion?
Studia Geophysica et Geodaetica
Strain accumulation along an oblique plate boundary: The Reykjanes Peninsula, southwest Iceland
Geophysical Journal International
2007
Discriminating volcano deformation due to magma movements and variable surface loads: Application to Katla subglacial volcano, Iceland
Geophysical Journal International
Glacio-isostatic deformation around the Vatnajökull ice cap, Iceland, induced by recent climate warming: GPS observations and finite element modeling
Journal of Geophysical Research: Solid Earth
2006
Icelandic rhythmics: Annual modulation of land elevation and plate spreading by snow load
Geophysical Research Letters
Current plate movements across the Mid-Atlantic ridge determined from 5 years of continuous GPS measurements in Iceland
Journal of Geophysical Research: Solid Earth
Volcano geodesy and magma dynamics in Iceland
Journal of Volcanology and Geothermal Research
Kinematic models of plate boundary deformation in southwest Iceland derived from GPS observations
Journal of Geophysical Research: Solid Earth
2005
Forecasting and monitoring a subglacial eruption in Iceland
Eos
2004
Coseismic stress changes and crustal deformation on the Reykjanes Peninsula due to triggered earthquakes on 17 June 2000
Journal of Geophysical Research: Solid Earth
2003
Deformation of Grímsvötn volcano, Iceland: 1998 eruption and subsequent inflation
Geophysical Research Letters
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