M. Ege Karaesmen
PhD Candidate in Geophysics

Decoding the deep structure of our planet.

Portrait of M. Ege Karaesmen

I am a PhD candidate in geophysics at the University of Texas at Austin, Jackson School of Geosciences, working on tectonics, paleogeodesy, paleoclimate and biogeology.

I use corals as natural instruments for measuring past earthquakes. My dissertation reconstructs how the New Georgia Island Group megathrust in the Solomon Islands deforms between and during earthquakes, using stable isotopes measured along coral cores together with satellite radar geodesy (InSAR).

Before Austin, I studied geology and geophysics at the University of Bonn, and worked as a meteorologist and data analyst on wind atlas modelling in Germany.

Read the research

Research

Reading the Earth through living archives.

My research combines numerical models, coral geochemistry, satellite radar geodesy and climate reanalysis to understand how the solid Earth, ocean and atmosphere record change.

Focus areas

Tectonics
Investigating the forces that shape the Earth's lithosphere, from continental rifting to the collision of plates that raises mountain ranges.
Paleogeodesy
Reconstructing ancient crustal deformation and surface motions by reading the geological record across deep time.
Paleoclimate
Examining climate signatures preserved in sedimentary basins to understand historical and future atmospheric change.
Biogeology
Exploring the feedback between the biosphere and geosphere, and how life and tectonics reshape one another.

Corals as natural instruments

Massive corals grow upward until they reach the sea surface and then stop, which makes them sensitive recorders of both ocean climate and land motion. A colony that is lifted during an earthquake dies back to the new waterline and leaves a dated surface in its own skeleton; one that subsides catches up by growing vertically again.

My dissertation reads that record along the New Georgia Island Group megathrust in the Solomon Islands, where the 2007 Mw 8.1 earthquake uplifted reefs across the island group. Stable isotopes recorded in the coral's skeleton deliver a temporally high-resolution time series. I developed a new proxy for relative water depth to reconstruct the vertical tectonic change captured in the coral's tissues.

01  /  Growth model

A living archive of sea-level change

A two-dimensional cellular automaton grows a coral colony under a prescribed relative sea-level history. The rules describe lateral extension, vertical catch-up during submergence, mortality on emergence, recolonisation and erosion.

Animated simulation of a coral colony growing under changing sea level
Modelled colony growth under the reconstructed relative sea-level history, with the 2007 uplift near the end of the run.
02  /  Time-series analysis

Fifty years of isotopes along a coral core

Oxygen isotopes measured at high resolution along a core through a coral head track sea-surface temperature and salinity, giving an independent, seasonally resolved chronology for the same colony the growth model describes.

Comparing that series against sea-surface salinity separates the climate signal from the land-motion signal, so that the remaining deformation history can be read against satellite radar geodesy over the instrumental period.

Nearly fifty years of δ¹⁸O measured along a coral core, against sea-surface salinity. Hover and zoom to explore individual samples.

Further work

A monsoon redistributed across India

Across the 1950–2025 ERA5 record, the Indian monsoon shows a regional pattern of change rather than a uniform national shift. Rainfall has declined along the west coast, in northeast India and in the Himalayan foothills, while central and peninsular India show little change.

At Goa, onset remains in early-to-mid June but withdrawal has moved about 12 days later since the 1950s, stretching the season even as overall intensity declines.

Onset, withdrawal and season length by decade, across seven points in India.
Publications

Posters and presentations.

Conference material from my dissertation work, free to download.

Conference posters

Preview of the EGU 2026 poster on high-resolution coral geodesy in the Solomon Islands 2026

High-resolution coral geodesy in the Solomon Islands

Development of a centennial record of vertical motion at a megathrust using coral δ¹³C

M. Ege Karaesmen, Luc Lavier, Frederick Taylor

University of Texas at Austin, UTIG · EGU General Assembly 2026, Vienna, 3–8 May 2026 · Session TS3.2 · EGU26-15880

Download poster (PDF, 4.4 MB) Abstract

Curriculum vitae

Physics, geophysics, atmosphere.

An academic path across two continents, from engineering geology to megathrust geodesy.

Education

Aug 2024 – present

PhD Geophysics

University of Texas at Austin, Jackson School of Geosciences, USA

Sep 2020 – Aug 2023

M.Sc. Physics of Earth and Atmosphere

University of Bonn, Germany

Oct 2016 – Sep 2020

B.Sc. Geosciences, specialised in Geophysics

University of Bonn, Germany

Work experience

Sep 2026 – Feb 2027

Teaching Assistant — GEO 311D: GeoData

University of Texas at Austin, USA

Jun 2025 – Aug 2026

Research Assistant

UT Austin, Jackson School of Geosciences, USA

Jan 2025 – May 2025

Teaching Assistant — GEO 303: Introduction to Geology

University of Texas at Austin, USA

Nov 2023 – Aug 2024

Meteorologist, Data Analyst & Consultant

anemos Gesellschaft für Umweltmeteorologie mbH, Lüneburg, Germany · Wind Atlas Department

Sep 2022 – Aug 2023

Teaching Assistant — Mathematics and Statistics in Biology

Institute for Applied Mathematics, University of Bonn, Germany · R exercises

Mar 2021 – Jul 2023

Research Assistant

Institute of Geophysics, University of Bonn, Germany

May 2019 – Jul 2020

Geologist

Ingenieurteam Dr. Hemling & Gräfe GmbH, Germany · Engineering Geology & Hydrogeology

Languages

Turkish
Native proficiency
German
Full working proficiency DSD II, 2014
English
Full working proficiency TOEFL iBT 101, 2023
French
Beginner
Italian
Beginner

Software

Python
Excellent NumPy, Pandas, SciPy, Matplotlib
GIS
Excellent QGIS, ArcGIS
LaTeX
Excellent
MS Office
Excellent Word, Excel, Access, PowerPoint
MATLAB
Confident
Linux
Confident
Git
Confident
R
Intermediate ggplot, dplyr
C++
Beginner

Outside the lab

Water polo · Bouldering · Classical guitar · Cinema · Literature · Cooking