BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//geodesy.science - IAG website - ECPv6.16.3//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-WR-CALNAME:geodesy.science - IAG website
X-ORIGINAL-URL:https://geodesy.science
X-WR-CALDESC:Events for geodesy.science - IAG website
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-Robots-Tag:noindex
X-PUBLISHED-TTL:PT1H
BEGIN:VTIMEZONE
TZID:UTC
BEGIN:STANDARD
TZOFFSETFROM:+0000
TZOFFSETTO:+0000
TZNAME:UTC
DTSTART:20250101T000000
END:STANDARD
END:VTIMEZONE
BEGIN:VTIMEZONE
TZID:UTC
BEGIN:STANDARD
TZOFFSETFROM:+0000
TZOFFSETTO:+0000
TZNAME:UTC
DTSTART:20250101T000000
END:STANDARD
END:VTIMEZONE
BEGIN:VTIMEZONE
TZID:Europe/Tirane
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20250330T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20251026T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20260329T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20261025T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20270328T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20271031T010000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=UTC:20260611T150000
DTEND;TZID=UTC:20260611T160000
DTSTAMP:20260608T131928
CREATED:20260424T132633Z
LAST-MODIFIED:20260424T132633Z
UID:35665-1781190000-1781193600@geodesy.science
SUMMARY:Talks on GIA Seminar
DESCRIPTION:Achraf Koulali (Newcastle University\, UK) and Matt King (University of Tasmania\, Australia) will present: \n“Sensitivity of Antarctic GPS time series to varying surface mass balance loads\, and implications for estimates of Glacial Isostatic Adjustment” \nAntarctic Global Positioning System (GPS) vertical time series exhibit non-linear signals across a wide range of temporal scales\, complicating the interpretation of long-term deformation associated with Glacial Isostatic Adjustment (GIA). One important contributor to these non-linearities is the short-term elastic response of the solid Earth to contemporaneous surface mass balance (SMB) variability. During the first part of this talk\, we will show analysis results of GPS vertical displacement time series from the Transantarctic Mountains (TAM) to quantify the impact of SMB-driven loading on observed crustal motion. SMBL-induced deformation is found to introduce multiyear apparent changes in vertical velocities. After correcting for SMB loading\, most GPS sites exhibit near-zero uplift rates\, with a median velocity of 0.67 mm/yr\, substantially lower than predicted by forward GIA models. We will then discuss these results within the wider context of Antarctica to show the critical role of SMB loading variability in interpreting GPS observations more widely\, with implications for estimates of present-day Antarctic ice mass change. As a second case study\, we will discuss the sensitivity of GPS velocities to SMB variability in a critical sector of East Antarctica\, including in the Denman-Totten glacier region\, suggesting that bedrock motion in that region is broadly of subsidence rather than uplift in contrast to GIA models. Finally\, we will show that modelled SMB variability can be compared with GPS elastic displacements across Antarctica\, as a new form of SMB model validation.
URL:https://geodesy.science/event/talks-on-gia-seminar-6/
CATEGORIES:Commission 3,IACS
ATTACH;FMTTYPE=image/jpeg:https://geodesy.science/wp-content/uploads/AdobeStock_236598424_landscape.jpeg
ORGANIZER;CN="Joint IAG-IACS Commission on Cryospheric Deformation (Sub-Commission 3.4)":MAILTO:matthias.willen@tu-dresden.de
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=UTC:20260708T150000
DTEND;TZID=UTC:20260708T160000
DTSTAMP:20260608T131928
CREATED:20260513T080930Z
LAST-MODIFIED:20260513T080930Z
UID:36272-1783522800-1783526400@geodesy.science
SUMMARY:Talks on GIA Seminar
DESCRIPTION:Tao Yuan (University of Colorado\, USA) working with\nShijie Zhong\, Glenn Milne\, Donna dePolo \nwill present \nReconciling inferences of mantle viscosity and late Quaternary ice history – the importance of an asthenosphere and 3-D viscosity \nDeglaciation history models from the last glacial maximum (LGM) and accompanying mantle viscosity structures have been jointly constrained by fitting the paleo-sea level data through glacial isostatic adjustment (GIA) modeling. However\, some GIA-inferred 1-dimensional (1-D) viscosity models\, including the widely used VM5a\, contradict the mantle viscosity structure inferred using other approaches\, such as seismic imaging\, mineral physics and geodynamics. Here we show that GIA models with realistic 3-D mantle viscosity derived from seismic structures with an effective activation energy of 300-400 kJ/mol and a weak asthenosphere fit paleo-sea level data in North America better than several widely used 1-D GIA models. Our results also demonstrate that the inclusion of the asthenosphere and lateral viscosity variations permits a larger range of North American ice sheet reconstructions that produce quality fits to the sea-level data\, including models with substantially greater volume at LGM\, thus identifying a potential solution to balancing the sea level budget during this key climate event. To fit far-field sea level data\, the ice volume at LGM in North America is required to be 10%-20% larger than that in ICE-6G\, if ice models outside North America are unchanged.
URL:https://geodesy.science/event/talks-on-gia-seminar-7/
CATEGORIES:Commission 3,IACS
ATTACH;FMTTYPE=image/jpeg:https://geodesy.science/wp-content/uploads/AdobeStock_236598424_landscape.jpeg
ORGANIZER;CN="Joint IAG-IACS Commission on Cryospheric Deformation (Sub-Commission 3.4)":MAILTO:matthias.willen@tu-dresden.de
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20260928
DTEND;VALUE=DATE:20261002
DTSTAMP:20260608T131928
CREATED:20250224T061238Z
LAST-MODIFIED:20251017T130541Z
UID:25562-1790553600-1790899199@geodesy.science
SUMMARY:IAG Commission 3 - TIGER Symposium in Geodesy
DESCRIPTION:  \n\nWe will be hosting three consecutive meetings in Gävle (Sweden) in autumn 2026. Please join us for: \n\nTracking and Investigating Geodynamics and Earth Rotation – TIGER Symposium in Geodesy (the 1st symposium of the IAG Commission 3 on Earth Rotation and Geodynamics\, in cooperation with the Journees meeting series) – September 28th to October 1st\, 2026\nGGOS Topical Meeting on Geohazards – October 1st and 2nd\, 2026\nGGOS Days 2026 – October 5th to 7th\, 2026\n\nThe meetings will be in a hybrid format. More details (e.g.\, website\, registration\, abstract submission) will be shared soon. We’re looking forward seeing you in autumn 2026! \nSincerely\, Rebekka Steffen (IAG commission 3 president)\, Laura Sanchez (GGOS President)\, Martin Sehnal (GGOS Coordinating Office)
URL:https://geodesy.science/event/tiger-symposium-commission3/
LOCATION:Gävle\, Sweden\, Gävle\, Sweden
CATEGORIES:Commission 3
ATTACH;FMTTYPE=image/png:https://geodesy.science/wp-content/uploads/tiger_logo_w-text_figure-website-scaled.png
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20261013
DTEND;VALUE=DATE:20261016
DTSTAMP:20260608T131928
CREATED:20260113T112535Z
LAST-MODIFIED:20260116T085845Z
UID:32647-1791849600-1792108799@geodesy.science
SUMMARY:21st Wegener Assembly\, Albania
DESCRIPTION:The Institute of Geosciences (IGEO) and joint IAG-IASPEI sub-commission “Seismo-geodesy” are delighted to invite you to the 21st WEGENER Assembly\, which will take place in Tirana\, Albania\, from October 13–15\, 2026. \nWEGENER meetings gather geodesists and geoscientists working in the Mediterranean\, earthquake processes and geodynamics. The WEGENER meeting is supported by International Association of Geodesy (IAG) and the International Association of Seismology and Physics of the Earth’s Interior (IASPEI)\, through Sub-commission 3.5 “Seismo-Geodesy” joint between IAG and IASPEI. \nWhether you are an established researcher\, an early-career scientist\, or a student\, Wegener assembly offers a unique opportunity to exchange ideas\, develop collaborations\, and strengthen our scientific community. \nThe meeting will be hosted by the Institute of Geosciences part of Polytechnic University of Tirana. \nAbstract submission and registration will open February\,2 2026. Early-bird registration will be available until July 15\, 2026. Proposed sessions are: \n1. Motion and deformation of the Mediterranean: from kinematics to dynamics\n2. Plate Boundary and Intraplate Processes from Geodetic Observations\n3. Faults and Earthquake Cycle Processes\n4. Geodesy Contribution to Seismic Hazard Assessment & Mitigation\n5. Surface Processes\, Hydrology\, and Anthropogenic Deformation\n6. Emerging Methods and Infrastructures\n7. Volcano and Volcano-Tectonic Deformation \nBeyond the science\, Tirana offers a lively and welcoming atmosphere\, with a blend of Ottoman\, Italian\, and modern architecture\, a vibrant café culture\, and easy access to Albania’s stunning landscapes from the Adriatic coast to the mountains and historical UNESCO World Heritage sites. Its central location and well-connected airport make it a really accessible and attractive destination for colleagues from all over Europe and beyond. \nWe warmly invite you to be part of WEGENER 21st Assembly and to contribute to advancing seismo-geodesy research in the Mediterranean and beyond.
URL:https://geodesy.science/event/21st-wegener-assembly-albania/
LOCATION:Polytechnic University of Tirana\, “Dëshmorët e Kombit”\, Square “Nënë Tereza”\, Tirana\, 1001\, Albania
CATEGORIES:Commission 3,IASPEI
ATTACH;FMTTYPE=image/png:https://geodesy.science/wp-content/uploads/21st-Wegener-Assembly.png
ORGANIZER;CN="SC 3.5 Seismo-geodesy":MAILTO:wegener2026@sciencesconf.org
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20280528
DTEND;VALUE=DATE:20280603
DTSTAMP:20260608T131928
CREATED:20251210T083426Z
LAST-MODIFIED:20251210T083426Z
UID:32258-1843084800-1843603199@geodesy.science
SUMMARY:2028 Glacial Isostatic Adjustment Workshop
DESCRIPTION:A workshop focused on glacial isostatic adjustment (GIA)\, ice sheets\, sea-level change\, and associated geodetic and geophysical observational constraints will be held in Dresden\, Germany\, from 28 May to 2 June 2028. This will be a follow-on workshop in a series of similar events. The last GIA Workshop took place in Sidney\, BC\, Canada\, in 2025 (cf. https://polenet.org/2025-gia-workshop/). Detailed information will be published in due time.
URL:https://geodesy.science/event/2028-glacial-isostatic-adjustment-workshop/
LOCATION:TU Dresden\, Dresden\, Germany
CATEGORIES:Commission 3,IACS,IAG,IASPEI,IUGG
ATTACH;FMTTYPE=image/jpeg:https://geodesy.science/wp-content/uploads/AdobeStock_236598424_landscape.jpeg
ORGANIZER;CN="IAG/IACS subcommission 3.4 %E2%80%9CCryospheric Deformation%E2%80%9D":MAILTO:mirko.scheinert@tu-dresden.de
END:VEVENT
BEGIN:VEVENT
DTSTART;VALUE=DATE:20280812
DTEND;VALUE=DATE:20280821
DTSTAMP:20260608T131928
CREATED:20260408T052910Z
LAST-MODIFIED:20260408T052910Z
UID:35257-1849651200-1850428799@geodesy.science
SUMMARY:CGU 2028-IGC2028 First Circular
DESCRIPTION:The Canadian Geophysical Union (CGU) 2028 annual meeting will be held in conjunction with the 38th International Geological Congress (IGC) in Calgary\, Canada\, from August 12–20\, 2028. Under the overarching theme “Geosciences for Humanity\,” this joint event serves as a premier global forum for advancing Earth science research and its societal applications. \nThe CGU program specifically anchors the Geomatics and Geodesy theme (Category V\, Group AJ)\, focusing on the critical role of geodetic infrastructure in monitoring a changing planet. \nKey Scientific Focus Areas: \n\nReference Frames & Gravity: Modernizing global and regional spatial frameworks.\nGeodynamics: Solid Earth processes\, active tectonics\, and natural hazard assessment.\nClimate & Cryosphere: Glacial Isostatic Adjustment (GIA) and sea-level change.\nSpace Geodesy: Advanced GNSS applications\, reflectometry\, and Earth observation.\nEnvironmental Monitoring: Hydrology and anthropogenic impact tracking.\n\nSubmission Deadline: Session proposals must be submitted via the Scientific Program Portal by March 2027. \nThe first circular is available here \n 
URL:https://geodesy.science/event/cgu-2028-igc2028-first-circular/
LOCATION:BMO Centre\, Calagry\, Canada
CATEGORIES:AGU,Commission 1,Commission 2,Commission 3,Commission 4,ECS,EGU,FIG,GGOS,IAG,IAG Comissions,IAG ICCs,IAG Projects,ICCC,ICCM,ICCT,Projet QuGe,📚 Education & Training
ATTACH;FMTTYPE=image/png:https://geodesy.science/wp-content/uploads/ICG2028_Calgary.png
END:VEVENT
END:VCALENDAR