A5028658261- Seismic Waves and Analysis
- Seismology and Earthquake Studies
- Cryospheric studies and observations
- Geophysics and Sensor Technology
- earthquake and tectonic studies
- Landslides and related hazards
- Methane Hydrates and Related Phenomena
- Geological and Geochemical Analysis
- Geology and Paleoclimatology Research
- Winter Sports Injuries and Performance
- Seismic Imaging and Inversion Techniques
- High-pressure geophysics and materials
- Advanced Fiber Optic Sensors
- Mechanical and Optical Resonators
- Geophysics and Gravity Measurements
- Meteorological Phenomena and Simulations
- Climate variability and models
- Geological and Geophysical Studies
- Earthquake Detection and Analysis
- Geological formations and processes
- Ionosphere and magnetosphere dynamics
- Geochemistry and Geologic Mapping
- Reservoir Engineering and Simulation Methods
- Astronomical Observations and Instrumentation
- Flow Measurement and Analysis
University of Potsdam
2019-2025
Dublin Institute For Advanced Studies
2015-2017
University College Dublin
2014-2017
Abstract Analyzing seismic data in a timely manner is essential for potential eruption forecasting and early warning volcanology. Here, we demonstrate that unsupervised machine learning methods can automatically uncover hidden details from the continuous signals recorded during Iceland’s 2021 Geldingadalir eruption. By pinpointing eruption’s primary phases, including periods of unrest, ongoing lava extrusion, varying fountaining intensities, effectively chart its temporal progress. We detect...
Interest in measuring displacement gradients, such as rotation and strain, is growing many areas of geophysical research. This results an urgent demand for reliable field-deployable instruments these quantities. In order to further establish a high-quality standard strain measurements seismology, we organized comparative sensor test experiment that took place November 2019 at the Geophysical Observatory Ludwig-Maximilians University Munich Fürstenfeldbruck, Germany. More than 24 different...
Abstract Cyclic behaviour is observed in volcanic phenomena ranging from caldera collapses to explosions, spattering or lava fountaining. The repeating processes can define irregular, regular systematically changing patterns. These patterns yield information about the subsurface structure, which often not considered detail. We analyse pattern of 7058 fountaining episodes that occur between 2 May and 14 June 2021 during Geldingadalir eruption, Iceland. Our seismometer records as tremor...
Monitoring and understanding volcano-seismic signals like long-period events tremor can improve eruption forecasting. Rotational sensors are newly developed instruments that offer enhanced monitoring capabilities by providing additional information on rotational motion enabling the differentiation of wave types seismic sources. In 2019 a array sensor along with co-located seismometer (6C) recorded for 25 days spanning an ash emissions Strombolian activity, characterized tremor. We compare...
Magmatic unrest within the Reykjanes Peninsula oblique rift zone, SW Iceland, ongoing since December 2019, has been closely monitored by a dense network of seismic and geodetic stations. A total 12 dyke intrusions 10 fissure eruptions have occurred near Fagradalsfjall Svartsengi-Grindavík. The 2021-2023 volcano-tectonic event consisted 4 intrusions, 3 which surfaced in eruptions. On 24 February 2021, intense seismicity along km long path, fed 6-months eruption, first around 780...
The 2021 Fagradalsfjall dike intrusion marked the initiation of a new era volcanism on Iceland’s Reykjanes Peninsula. In this study, we present large automatic catalog consisting more than 80,000 earthquake hypocenters spanning full period intrusion, which were derived from seismic data recorded by dense network stations. 9 – 10 km long exhibits two-segment geometry similar lengths. Linear regression relatively relocated subset over 12,000 earthquakes revealed strike...
Recent advances in seismology underscore the potential of innovative instrumentation and data-driven methods to overcome long-standing challenges source localization. Traditional techniques such as P-wave polarization or arrival time analysis often suffer from reduced precision complex wavefields, where scattering heterogeneities distort seismic signals. These limitations highlight need for that leverage emerging technologies provide robust uncertainty quantification.In this study, we used a...
Similar to volcanoes, regularly erupting geothermal features such as geysers are based on a delicate balance between heat source, fluid and geometry. This can be easily disturbed by various internal or external factors landslides, earthquakes the weather. However, due lack of long-term studies, these relationships remain unclear in most cases. Here we examine effect weather detail study. We include 4.5 years seismic data our study compile water fountain catalogue containing 650 000 events....
Abstract Glacier runoff and melt from volcanic geothermal activity accumulates in glacier dammed lakes glaciated areas around the world. These eventually drain, creating hazardous subglacial floods that are usually only confirmed after they exit reach local river systems, which can be many tens of kilometres flood source. Once travel rapidly to populated areas. Such delayed detection represents a potentially lethal shortcoming early-warning. Here we demonstrate how advance early-warning...
We analyze eruptive tremor during one of the largest effusive eruptions in historical times Iceland (2014/2015 Holuhraun eruption). Seismic array recordings are compared with effusion rates deduced from Moderate Resolution Imaging Spectroradiometer and ground video monitoring data lead to identification three coexisting sources. This contrasts other studies that generally link only source usually associated vent. The sources (i) a is stable back azimuth shows bursts ramp‐like decrease...
Abstract The eruption frequency of geysers can be studied easily on the surface. However, details internal structure including possible water and gas filled chambers feeding eruptions driving mechanisms often remain elusive. We used a multidisciplinary network seismometers, video cameras, pressure sensors one tiltmeter to study eruptive cycle, structure, cycle Strokkur geyser in June 2018. An at always consists four phases: (1) Eruption, (2) post‐eruptive conduit refilling, (3) filling...
Abstract We use a dense seismic network on the Reykjanes Peninsula, Iceland, to image group of earthquakes at 10–12 km depth, 2 north-east 2021 Fagradalsfjall eruption site. These deep have lower frequency content compared located in upper, brittle crust and are similar long period (DLP) seismicity observed other volcanoes Iceland around world. several swarms DLP between start study (June 2020) initiation 3-week-long dyke intrusion that preceded March 2021. During eruption, earthquake...
SUMMARY The massive eruption of the Hunga Volcano on 15 January 2022 provides an ideal test case for reviewing established methods to discriminate and analyse source processes. Discriminating mechanisms identifying their origins is a key task when analysing suspicious events in frame Comprehensive Nuclear-Test-Ban Treaty (CTBT). Earthquakes explosions can be distinguished some cases using well such as inversion seismic moment tensor. In more complex combination analyses seismic, infrasonic...
Abstract Geysers are hot springs whose frequency of water eruptions remain poorly understood. We set up a local broadband seismic network for 1 year at Strokkur geyser, Iceland, and developed an unprecedented catalog 73,466 eruptions. detected 50,135 single but find that the geyser is also characterized by sets to six in quick succession. The number sextuple exponentially decreased, while mean waiting time after eruption linearly increased (3.7 16.4 min). While secondary within double have...
Abstract [Volcanic eruptions generate continuous or episodic tremor, which can provide unrivaled information about activity changes during eruption. However, the wealth of in tremor patterns is often not harvested and transitions between remain obscure. The 2021 Geldingadalir eruption, Iceland, an exceptional case, where lava effusion caused 8698 episodes spanning two orders magnitude duration repose. Based on seismometer video camera data, we associate several‐minute‐long, symmetrical with...
Aside from captivating our senses, geysers have much to tell us about subsurface fluids, climate change effects, and the occurrence limits of life on Earth elsewhere in solar system.
We use frequency domain methods usually applied to volcanic tremor analyse ground based seismic recordings of a helicopter. preclude misinterpretations sources and show alternative applications our seismological methods. On volcano, the source can consist repeating, closely spaced, small earthquakes. Interestingly, similar signals are generated by helicopters due repeating pressure pulses from rotor blades. In both cases continuous referred as tremor. As gliding is in this case merely caused...
Eruptions of volcanoes and geysers share many fundamental similarities: for example, they are manifestations Earth’s geothermal energy, involving the pressure-driven expulsion fluids from interior. However, while can produce spectacular lava bubbles that burst, water rarely observed on surface geysers. It is still unclear why some these low-viscosity geyser systems none, others them regularly. There no quantification size, speed, height at geysers, which gap we fill here. Strokkur creates a...
Abstract. In volcanic eruption monitoring, it is urgent to promptly detect changes in the system during crisis period. Ideally continuous, temporally high-resolution, multidisciplinary data available for this. However, some volcanoes are only being monitored using a single discipline or seismic station. this case, makes sense harvest information from limited set with several different techniques. Changes complexity could reveal dynamic due magma propagation. We tested performance of...
Many of the world's largest volcanic eruptions are associated with geological rifting where major fractures open at Earth's surface, yet fundamental controls on near-surface response to process lacking. New high resolution observations gleaned from seismometer data during 2014 Bárðarbunga basaltic dyke intrusion in Iceland allow us unprecedented access graben formation both sub-second and micrometre scales. We find that what appears as quasi steady-state lower GPS observation comprises...
Abstract Volcanic tremor signals are usually observed before or during volcanic eruptions and must be monitored to evaluate the activity. A challenge in studying seismic of origin is coexistence transient signal swarms long-lasting signals. Separating events from tremors can, therefore, contribute improving upon our understanding underlying physical processes. Exploiting idea harmonic–percussive separation musical processing, we develop a method extract harmonic detect recordings. Based on...