triggering

Untangling the environmental and tectonic drivers of the Noto earthquake swarm in Japan

The underlying mechanism of the ongoing seismic swarm in the Noto Peninsula, Japan, which generates earthquakes at 10 times the average regional rate, remains elusive. We capture the evolution of the subsurface stress state by monitoring changes in …

A recursive matched-filter to systematically explore a volcanic long-period earthquake swarm

The matched-filter technique is an effective way to detect repeats, or near-repeats, of a seismic source, but prior identification of an event from that source to use as a template is required. We propose a recursive matched-filter approach to …

Tracking the Spatio-Temporal Evolution of Foreshocks Preceding the Mw 6.1 2009 L’Aquila Earthquake

How faulting processes lead to a large earthquake is a fundamental question in seismology. To better constrain this pre-seismic stage, we create a dense seismic catalog via template matching to analyze the precursory phase of the Mw 6.1 L’Aquila …

An adaptable random forest model for the declustering of earthquake catalogs

Earthquake catalogs are essential to analyze the evolution of active fault systems. The background seismicity rate, or rate of earthquakes that are not directly triggered by other earthquakes, directly relates to the stressing rate, a crucial …

Isolated Triggered Tremor Spots in South America: Southern Chile, Ecuador, and Central Colombia

We report new observations of triggered tectonic tremor in three regions in South America along the plate boundary between the Nazca and South America plates: southern Chile, Ecuador, and central Colombia. In these regions, tremor was observed during …

Improving Physics-Based Aftershock Forecasts during the 2016– 2017 Central Italy Earthquake Cascade

The 2016– 2017 Central Apennines earthquake sequence is a recent example of how damages from subsequent aftershocks can exceed those caused by the initial mainshock. Recent studies reveal that physics-based aftershock forecasts present comparable …

The Forecasting Skill of Physics-based Seismicity Models during the 2010–2012 Canterbury, New Zealand, Earthquake Sequence

The static coulomb stress hypothesis is a widely known physical mechanism for earthquake triggering and thus a prime candidate for physics-based operational earthquake forecasting (OEF). However, the forecast skill of coulomb-based seismicity models …

A Nonplanar Slow Rupture Episode during the 2000 Miyakejima Dike Intrusion

Magmatic intrusions release extensional strain in the Earth's crust upon availability of magma. Intrusions are typically accompanied by earthquake swarms and by surface faulting that is often larger than what is expected from the magnitude of the …

Repeating seismicity in the shallow crust modulated by transient stress perturbations

Recent studies have reported seismic phenomena that are modulated by small stress perturbations ($∼$ 10 kPa), revealing their critically stressed nature. Such observations have been principally limited to plate interfaces with their occurrence linked …

A Parallel Code to Calculate Rate-State Seismicity Evolution Induced by Time Dependent, Heterogeneous Coulomb Stress Changes

The estimation of space and time-dependent earthquake probabilities, including aftershock sequences, has received increased attention in recent years, and Operational Earthquake Forecasting systems are currently being implemented in various …