Sebastian Heimann
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View article: The quest for the oldest case of global earthquake triggering
The quest for the oldest case of global earthquake triggering Open
Large earthquakes can trigger other earthquakes at great distances, even on a global scale, through the dynamic stresses imparted by their seismic waves. However, identifying such remote triggering is not always straightforward. It may occ…
View article: Qseek: A data-driven Framework for Automated Earthquake Detection, Localization and Characterization
Qseek: A data-driven Framework for Automated Earthquake Detection, Localization and Characterization Open
We introduce a data-driven method and software for detecting and locating earthquakes in large seismic datasets. By combining seismic phase arrival annotations, delivered by neural network phase pickers, and waveform stacking with an adapt…
View article: Understanding the Seismic Signature of Transtensional Opening in the Reykjanes Peninsula Rift Zone, SW Iceland
Understanding the Seismic Signature of Transtensional Opening in the Reykjanes Peninsula Rift Zone, SW Iceland Open
We analyze seismicity and centroid moment tensors (CMTs) on the Reykjanes Peninsula, Iceland, during the early phase of a widespread unrest period that led to multiple fissure eruptions between 2021 and 2024. We use a dense temporary seism…
View article: Observer reliability in counting erythrocyte ghost cells and impact of short-term storage of canine and feline blood samples
Observer reliability in counting erythrocyte ghost cells and impact of short-term storage of canine and feline blood samples Open
The presence of erythrocyte ghost cells (EG) in blood smears indicates intravascular haemolysis or in-vitro haemolysis. However, observer reliability in detection of EG has not been documented. Immediate blood smear preparation is advised …
View article: Earthquake Moment Magnitudes from Peak Ground Displacements and Synthetic Green's Functions
Earthquake Moment Magnitudes from Peak Ground Displacements and Synthetic Green's Functions Open
We suggest an approach employing full waveforms from synthetic seismograms to estimate moment magnitudes and their uncertainties from peak amplitudes. The new method is theoretically derived. It does not change the established routines of …
View article: The 16 September 2023 Greenland Megatsunami: Analysis and Modeling of the Source and a Week-Long, Monochromatic Seismic Signal
The 16 September 2023 Greenland Megatsunami: Analysis and Modeling of the Source and a Week-Long, Monochromatic Seismic Signal Open
On 16 September 2023, a cascade of events occurred in East Greenland, involving a large tsunami that hit a military unit. Here, we use seismic waveform data recorded on regional to global scales and compare to high-resolution satellite ima…
View article: Illuminating the Transition From an Open to a Semi‐Closed Volcanic Vent System Through Episodic Tremor Duration and Shape
Illuminating the Transition From an Open to a Semi‐Closed Volcanic Vent System Through Episodic Tremor Duration and Shape Open
[Volcanic eruptions generate continuous or episodic tremor, which can provide unrivaled information about activity changes during eruption. However, the wealth of information in episodic tremor patterns is often not harvested and transitio…
View article: Advancing Seismic Event Detection: Integrating Machine Learning with Waveform-Stacking Techniques
Advancing Seismic Event Detection: Integrating Machine Learning with Waveform-Stacking Techniques Open
In the realm of seismic and microseismic event detection and localization, our research marks a significant step forward by integrating machine learning with advanced waveform-stacking techniques for detecting, locating and characterising …
View article: An overview of tremor and icequake types during the 2015 Eastern Skaftá jökulhlaup, Iceland
An overview of tremor and icequake types during the 2015 Eastern Skaftá jökulhlaup, Iceland Open
Ice-covered volcanoes regularly cause subglacial floods called jökulhlaups. These may be caused by volcanic eruptions but more often they are associated with geothermal activity beneath the ice. Within this presentation we will study …
View article: Challenges of Rotational Ground Motion Measurements in the Local Distance Range
Challenges of Rotational Ground Motion Measurements in the Local Distance Range Open
Since almost two decades, there is a fast and steady progress in understanding the rotational part of the seismic wavefield and exploring possible applications. These achievements are based on studies using simulated data, array-derived me…
View article: Array seismologic insights into Skaftá jökulhlaups (GLOFs), Iceland, 2014-2016.
Array seismologic insights into Skaftá jökulhlaups (GLOFs), Iceland, 2014-2016. Open
GLOFs, glacier lake outburst floods – or by their local type name jökulhlaups – sometimes travel and propagate subglacially. Usually, these subglacial floods can be observed only indirectly using records of the related gla…
View article: Seismological analysis of the September 16, 2023 Greenland landslide triggering a 50 hours long monochromatic very long-period signal
Seismological analysis of the September 16, 2023 Greenland landslide triggering a 50 hours long monochromatic very long-period signal Open
On September 16, 2023, a landslide collapsed in the Dickson Fjord, a remote area of East Greenland. The collapse triggered a tsunami that hit Ella Island, which lies to the east of the fjord. The mass movement is identified in high resolut…
View article: Subaerial and subglacial seismic characteristics of the largest measured jökulhlaup from the eastern Skaftá cauldron, Iceland
Subaerial and subglacial seismic characteristics of the largest measured jökulhlaup from the eastern Skaftá cauldron, Iceland Open
Subglacial floods cause seismic tremors that can be located and tracked in space and time using a seismic array. Here, we shed light on the generating mechanisms of the seismic signals observed during the largest measured flood from the ea…
View article: The January 2022 Hunga Volcano explosive eruption from the multitechnological perspective of CTBT monitoring
The January 2022 Hunga Volcano explosive eruption from the multitechnological perspective of CTBT monitoring Open
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 source mechanisms and identifying their origins…
View article: Accelerating low-frequency ground motion simulation for finite fault sources using neural networks
Accelerating low-frequency ground motion simulation for finite fault sources using neural networks Open
SUMMARY In the context of early emergency response to moderate and large earthquake shaking, we present a simulation based low-frequency ground motion estimation workflow that expedites an existing simulation method while taking into accou…
View article: Centroid full moment tensor analysis reveals fluid channels opened by induced seismicity at EGS, Helsinki region, southern Finland
Centroid full moment tensor analysis reveals fluid channels opened by induced seismicity at EGS, Helsinki region, southern Finland Open
Understanding fluid injection induced seismicity is key to safe and successful operations of deep geothermal systems. Efficient geothermal energy extraction by an enhanced geothermal system (EGS) requires increased fluid flow between geoth…
View article: Surprising seismological signals during the October 2015 Skaftá jökulhlaup
Surprising seismological signals during the October 2015 Skaftá jökulhlaup Open
Understanding the spatiotemporal details in the occurrence of jökulhlaups, also referred to as glacier lake outburst floods (GLOFs), is important for improving early warning and forecasting future events. Jökulhlaups occur in man…
View article: TwistPy: An open-source Python toolbox for wavefield inertial sensing techniques
TwistPy: An open-source Python toolbox for wavefield inertial sensing techniques Open
In the past decade, significant progress has been made in the acquisition and processing of seismic wavefield gradient data (e.g., recordings of ground strain and rotation). When combined with conventional multicomponent seismic data, wave…
View article: Rotational ground motion recordings in the West Bohemia / Vogtland region for waveform inversion for seismic moment tensors
Rotational ground motion recordings in the West Bohemia / Vogtland region for waveform inversion for seismic moment tensors Open
In synthetic tests, rotational ground motion recordings proved to be beneficial for the wavefrom inversion for seismic moment tensors. In a next step, we want to verify these findings using real measurements. To do so, we installed two bro…
View article: Grond reports for the seismic moment tensor inversions done for "The January 2022 Hunga Volcano explosive eruption from the multi-technological perspective of CTBT monitoring"
Grond reports for the seismic moment tensor inversions done for "The January 2022 Hunga Volcano explosive eruption from the multi-technological perspective of CTBT monitoring" Open
This are the Grond reports of the seismic moment tensor inversion done for the manuscript submitted to GJI titled: "The January 2022 Hunga Volcano explosive eruption from the multi-technological perspective of CTBT monitoring" You can view…
View article: Grond reports for the seismic moment tensor inversions done for "The January 2022 Hunga Volcano explosive eruption from the multi-technological perspective of CTBT monitoring"
Grond reports for the seismic moment tensor inversions done for "The January 2022 Hunga Volcano explosive eruption from the multi-technological perspective of CTBT monitoring" Open
This are the Grond reports of the seismic moment tensor inversion done for the manuscript submitted to GJI titled: "The January 2022 Hunga Volcano explosive eruption from the multi-technological perspective of CTBT monitoring" You can view…
View article: Grond reports for the seismic moment tensor inversions done for "The January 2022 Hunga Volcano explosive eruption from the multi-technological perspective of CTBT monitoring"
Grond reports for the seismic moment tensor inversions done for "The January 2022 Hunga Volcano explosive eruption from the multi-technological perspective of CTBT monitoring" Open
This are the Grond reports of the seismic moment tensor inversion done for the manuscript submitted to GJI titled: "The January 2022 Hunga Volcano explosive eruption from the multi-technological perspective of CTBT monitoring" You can view…
View article: Grond reports for the seismic moment tensor inversions done for "The January 2022 Hunga Volcano explosive eruption from the multi-technological perspective of CTBT monitoring"
Grond reports for the seismic moment tensor inversions done for "The January 2022 Hunga Volcano explosive eruption from the multi-technological perspective of CTBT monitoring" Open
This are the Grond reports of the seismic moment tensor inversion done for the manuscript submitted to GJI titled: "The January 2022 Hunga Volcano explosive eruption from the multi-technological perspective of CTBT monitoring" You can view…
View article: Extended Supplement for De-noising distributed acoustic sensing data using an adaptive frequency-wavenumber filter
Extended Supplement for De-noising distributed acoustic sensing data using an adaptive frequency-wavenumber filter Open
This electronical extended supplement presents an adaptive frequency-wavenumber filter suppresses the incoherent seismic noise while amplifying the coherent wave field in seismic distributed acoustic sensing (DAS) data. We analyse the resp…
View article: Extended Supplement for De-noising distributed acoustic sensing data using an adaptive frequency-wavenumber filter
Extended Supplement for De-noising distributed acoustic sensing data using an adaptive frequency-wavenumber filter Open
This electronical extended supplement presents an adaptive frequency-wavenumber filter suppresses the incoherent seismic noise while amplifying the coherent wave field in seismic distributed acoustic sensing (DAS) data. We analyse the resp…
View article: A comprehensive model of the precursors leading to the 2021 Fagradalsfjall eruption 
A comprehensive model of the precursors leading to the 2021 Fagradalsfjall eruption  Open
<p>A period of intense seismicity started more than a year prior to the 2021 Fagradalsfjall eruption in Iceland. During the same period, repeated cycles of surface uplift and subsidence were observed in the Svartsengi and Kr&#253…
View article: A massive earthquake swarm driven by magmatic intrusion at the Bransfield Strait, Antarctica
A massive earthquake swarm driven by magmatic intrusion at the Bransfield Strait, Antarctica Open
<p><span>A swarm </span><span>of</span> <span>~8</span><span>5</span><span>,000 </span><span>volcano-tectonic earthquakes started in August 2020 </span><span&…
View article: Multiphase observations of a meteoroid in Iceland recorded over 40 km of telecommunications cables and a large-N network
Multiphase observations of a meteoroid in Iceland recorded over 40 km of telecommunications cables and a large-N network Open
<p>On July 2, 2021, around 22:44 CET, a meteoroid was observed crossing the sky near Lake Thingvallavatn east of Reykjavik in Iceland. During this event, a large-N seismic network consisting of 500, 3-component geophones was monitori…