Results 31 to 40 of about 1,074 (110)
Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.Abstract On March 9th $9\mathrm{th}$, 2023, three small earthquakes (3.8≤Mw≤4.5) $(3.8\le {M}_{w}\le 4.5)$ occurred near Umbertide (Central Italy), within 4 hours. Analyzing seismic ambient noise in the frequency band 0.1–1 Hz from six seismometers within 20 km of the Mw 4.5, we detect a significant drop in seismic velocity at the time of occurrence of
Eugenio Mandler +7 more
wiley +1 more source
Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.Abstract Recent studies have challenged the classical view of magma chambers as ephemeral, melt‐rich bodies confined to shallow depths beneath arc volcanoes at subduction zones. Instead, increasing evidence supports the existence of long‐lived, vertically extensive magmatic systems with persistent partial melts within the crust. Nevertheless, the depth
Qili Andy Dai +4 more
wiley +1 more source
Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.Abstract Observations of ground deformation provide insights on the triggering mechanisms of eruptions. At Aniakchak Crater (Aleutians) InSAR measured ∼ ${\sim} $72 cm of uplift in less than 7 months between 2022 and 2023. The uplift can be explained by the inflation of a point pressure source at a depth of 3.2 km.
Francisco Delgado
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Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.Abstract Episodes of volcanic tremor provide valuable insights into the dynamics of subsurface processes at active volcanoes. Previous studies have suggested that evolving tremor properties may relate to changes in the stress conditions of the plumbing system. However, a strong causative link has remained elusive.
A. S. Yates +6 more
wiley +1 more source
Davemaoite Elasticity Reveals Slab‐Induced Heterogeneity in the Mantle Transition Zone
Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.Abstract The observed 2%–7% low‐shear velocity (VS) anomalies near the subducted slab at the bottom mantle transition zone (MTZ) indicate strong lateral heterogeneity, which is commonly attributed to subducted oceanic crust. However, davemaoite, a major constituent of the subducted oceanic crust, has been poorly constrained in its elasticity, hindering
Yingxin Yu +13 more
wiley +1 more source
Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.Abstract Alaska's tectonic complexity makes it ideal for probing upper mantle deformation. We present a 3D shear‐wave anisotropy model obtained by inverting 7,985 SKS splitting intensity measurements from 261 broadband stations using 941 events from 2000 to 2023.
Yi Lin, Manuele Faccenda, Li Zhao
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Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.Abstract The Northeastern (NE) Tibet, as the front of plateau growth, widely absorbs northeastward extrusion, leading to significant uplift and forming a basin‐mountain tectonic framework. However, it remains unclear how the crust of NE Tibet deformed in response to the far‐field effects of the India‐Eurasia collision.
Ruo‐Jie Li +4 more
wiley +1 more source
Permeability Enhancement by Slow Faulting Under High Pore Fluid Pressure
Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.Abstract The morphology of fault zones formed by slow faulting is markedly different from that of brittle faulting. In this study, we quantify the three‐dimensional (3D) pore distribution and permeability structures of two rock samples that have been deformed to failure by slow and brittle faulting, respectively.
Tommaso Mandolini +3 more
wiley +1 more source
Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.Abstract The Sagaing Fault (SF) accommodates major plate motion in Myanmar, yet large earthquakes along it have rarely been captured by modern geodetic and seismic observations. The 2025 Sagaing earthquake generated an exceptionally long rupture (∼535 km), offering a rare opportunity to investigate rupture dynamics along continental transform fault. We
Zhenjiang Liu +8 more
wiley +1 more source
Lake Unloading Drives Fault Slip and Rift Asymmetry in Southern Tibet
Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.Abstract The extent to which surface processes drive continental deformation remains a pivotal question in geodynamics. Here, we demonstrate that Late Quaternary lake‐water unloading is a primary driver of fault slip and rift asymmetry in southern Tibet.
Chunrui Li +4 more
wiley +1 more source