Results 91 to 100 of about 5,368 (195)
Typhoon‐Driven Near‐Surface Groundwater Dynamics Revealed by Ambient Noise in the Mountain Watershed
Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.Abstract Near‐surface groundwater dynamics (NSGD) regulate water residence time and downstream water resources in mountain watersheds, yet whether a single extreme rainfall event can reorganize near‐surface storage remains unclear. Here, we examine typhoon‐driven NSGD using ambient seismic noise from four stations, together with hydrological and ...
Cheng‐Hua Tsai +3 more
wiley +1 more source
Time-lapse Very Long Baseline Interferometry Imaging of the Close Active Binary HR 1099
The Astrophysical JournalWe report multiepoch astrometric very long baseline interferometry observations of the chromospherically active binary HR 1099 (V711 Tau, HD 22468) at six epochs over 63 days using the Very Long Baseline Array at 22.2 GHz.
Walter W. Golay +2 more
doaj +1 more source
Effects of Side Bileaders on Parent Positive Leader
Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.Abstract Side bileaders are commonly induced near a progressing positive leader, yet their effects on the parent positive leader remain poorly understood. Here we investigate their effects by combining high‐speed video with LF/VLF lightning channel mapping.
Shanfeng Yuan +11 more
wiley +1 more source
Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.Abstract The role of inherited lithospheric structures in active rift seismicity and magma intrusion remains a key uncertainty in continental breakup dynamics. We investigate the January 2025 Northern Main Ethiopian Rift swarm using constrained 3‐D gravity inversion and D‐InSAR observations to characterize crustal architecture, seismicity, and active ...
Denberu Besfat, Tilahun Mammo
wiley +1 more source
The Astrophysical JournalPrimordial black holes (PBHs) formed in the early Universe represent a well-motivated dark matter candidate. However, their abundance in the intermediate-to-high mass range (10 ^6 –10 ^9 M _⊙ ) remains relatively less constrained.
Xinyue Jiang +6 more
doaj +1 more source
The Role of the Interferometric Phase in Measuring Black Hole Photon Rings
The Astrophysical JournalThe Event Horizon Telescope (EHT) captured the first images of a black hole using Very Long Baseline Interferometry (VLBI). In the near future, extensions of the EHT such as the Black Hole Explorer (BHEX) will allow access to finer-scale features, such ...
Sol Gutiérrez-Lara +2 more
doaj +1 more source
Interferometric Inference of Black Hole Spin from Photon Ring Size and Brightness
The Astrophysical JournalThe n = 1 photon ring is a full image of the astrophysical source around a black hole, produced by photons that execute n ≈ 1 half-orbit around the event horizon on their way to an observer.
Joseph R. Farah +3 more
doaj +1 more source
The Astrophysical JournalThe Event Horizon Telescope (EHT) has produced resolved images of the supermassive black holes (SMBHs) Sgr A* and M87*, which present the largest shadows on the sky.
Xinyue Alice Zhang +8 more
doaj +1 more source