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Spectral-element method codes for computational seismology | specfem.org | Science & Technology | Earth, Moon & Mars 🌎
when a SPECFEM developer has a summer holiday project.. check out seismic wiggles :) apps.apple.com/us/app/wiggl... #Wiggles #FDSNstationmonitor #iOS
September 22, 2025 at 8:10 PM
when a SPECFEM developer has a summer holiday project.. check out seismic wiggles :) apps.apple.com/us/app/wiggl... #Wiggles #FDSNstationmonitor #iOS
air strike reported on June 22, 2025, 2:30am local time (23:00 UTC on 2025-06-21) - not much visible in available data at closest stations AB.HASN, AB.YNKD and IU.GNI (~500-800 km away from Fordow site). main signal visible between 21:45-22:15 UTC is a Mw6.0 earthquake (epicenter in Japan)
June 24, 2025 at 11:53 PM
air strike reported on June 22, 2025, 2:30am local time (23:00 UTC on 2025-06-21) - not much visible in available data at closest stations AB.HASN, AB.YNKD and IU.GNI (~500-800 km away from Fordow site). main signal visible between 21:45-22:15 UTC is a Mw6.0 earthquake (epicenter in Japan)
#specfem3d peak-ground motion (PGV) shakemap of the time-reversal simulation of the Birch glacier collapse. it should highlight the event site - but sometimes things are not so simple.
June 5, 2025 at 4:21 PM
#specfem3d peak-ground motion (PGV) shakemap of the time-reversal simulation of the Birch glacier collapse. it should highlight the event site - but sometimes things are not so simple.
#specfem3d time-reversal simulation of the Birch glacier collapse. Reinjecting seismic data from all available Swiss broadband stations together with the velocity model from Diehl et al. (2021) pinpoints the source of all that seismic energy...
June 5, 2025 at 4:14 PM
#specfem3d time-reversal simulation of the Birch glacier collapse. Reinjecting seismic data from all available Swiss broadband stations together with the velocity model from Diehl et al. (2021) pinpoints the source of all that seismic energy...
Spectral accelerations (SA) at the Bangkok building collapse site based on the synthetics of the updated USGS finite-fault solution of the Myanmar Mw7.7 earthquake #specfem3d #USGS
March 31, 2025 at 9:36 PM
Spectral accelerations (SA) at the Bangkok building collapse site based on the synthetics of the updated USGS finite-fault solution of the Myanmar Mw7.7 earthquake #specfem3d #USGS
#shakemovie simulation with the updated USGS finite-fault solution of the Myanmar Mw7.7 #earthquake w/ USGS Vs30 and EarthScope EMC FWEA23 (Liu et al. 2024) model #specfem3d #USGS #EarthScope #blender
March 30, 2025 at 10:34 PM
#shakemovie simulation with the updated USGS finite-fault solution of the Myanmar Mw7.7 #earthquake w/ USGS Vs30 and EarthScope EMC FWEA23 (Liu et al. 2024) model #specfem3d #USGS #EarthScope #blender
PGV shakemap for the Myanmar Mw7.7 #earthquake based on the updated version of the USGS finite-fault solution #specfem3d #shakemap #USGS
March 30, 2025 at 10:28 PM
PGV shakemap for the Myanmar Mw7.7 #earthquake based on the updated version of the USGS finite-fault solution #specfem3d #shakemap #USGS
PGV shakemap for the Myanmar Mw7.7 #earthquake based on USGS finite-fault solution #specfem3d #shakemap
March 28, 2025 at 1:51 PM
PGV shakemap for the Myanmar Mw7.7 #earthquake based on USGS finite-fault solution #specfem3d #shakemap
2025-03-28 Myanmar Mw7.7 #earthquake - shakemovie simulation w/ USGS finite-fault solution and IRIS EMC GLAD-M35 (Cui et al. 2024) model #specfem3d #shakemovie #geoscience #USGS #EarthScope #blender #b3d
March 28, 2025 at 1:49 PM
2025-03-28 Myanmar Mw7.7 #earthquake - shakemovie simulation w/ USGS finite-fault solution and IRIS EMC GLAD-M35 (Cui et al. 2024) model #specfem3d #shakemovie #geoscience #USGS #EarthScope #blender #b3d
Last Friday, two strong Mw6.2 earthquakes struck near Panama and Alaska - just ~3 minutes apart - followed by a smaller Mw5.7 quake. As if Panama and Alaska decided to sync up.. here’s a #shakeMovie visualization - watch as they light up the Earth with some nice fringes #specfem3dGLOBE
March 26, 2025 at 9:40 PM
Last Friday, two strong Mw6.2 earthquakes struck near Panama and Alaska - just ~3 minutes apart - followed by a smaller Mw5.7 quake. As if Panama and Alaska decided to sync up.. here’s a #shakeMovie visualization - watch as they light up the Earth with some nice fringes #specfem3dGLOBE
#SPECFEM codes hit 30,000+ citations!
awkward moment. when your simulation software has a bigger social circle than you do and your code is more popular than you’ll ever be. 🙂 well done Dimitri.
specfem.org
awkward moment. when your simulation software has a bigger social circle than you do and your code is more popular than you’ll ever be. 🙂 well done Dimitri.
specfem.org
March 5, 2025 at 9:06 PM
#SPECFEM codes hit 30,000+ citations!
awkward moment. when your simulation software has a bigger social circle than you do and your code is more popular than you’ll ever be. 🙂 well done Dimitri.
specfem.org
awkward moment. when your simulation software has a bigger social circle than you do and your code is more popular than you’ll ever be. 🙂 well done Dimitri.
specfem.org
for comparison, this simulation is using the same mesh resolution, but with flat topography and just a single centroid-moment tensor (CMT) source. the noisy scattering pattern is mostly due to the USGS finite-fault solution that uses 147 single point sources with interfering wavefields.
January 8, 2025 at 7:20 PM
for comparison, this simulation is using the same mesh resolution, but with flat topography and just a single centroid-moment tensor (CMT) source. the noisy scattering pattern is mostly due to the USGS finite-fault solution that uses 147 single point sources with interfering wavefields.
PGV shakemap for the Shigatse Mw 7.1 #earthquake based on USGS finite-fault solution #specfem3d #shakemap
January 7, 2025 at 9:08 PM
PGV shakemap for the Shigatse Mw 7.1 #earthquake based on USGS finite-fault solution #specfem3d #shakemap
2025-01-07 Shigatse Mw 7.1 #earthquake - shakemovie simulation w/ USGS finite-fault solution and IRIS EMC GLAD-M35 (Cui et al. 2024) model #specfem3d #shakemovie #geoscience #USGS #IRIS #EarthScope #blender #b3d
January 7, 2025 at 9:08 PM
2025-01-07 Shigatse Mw 7.1 #earthquake - shakemovie simulation w/ USGS finite-fault solution and IRIS EMC GLAD-M35 (Cui et al. 2024) model #specfem3d #shakemovie #geoscience #USGS #IRIS #EarthScope #blender #b3d
Peak-Ground Velocity (PGV) maps do care about small-scale effects - here's using the local simulation with and without the USGS VS30 near-surface velocity model (background regional model from IRIS EMC LSP_Eucrust1.0, Lu et al. 2018)
December 20, 2024 at 4:51 PM
Peak-Ground Velocity (PGV) maps do care about small-scale effects - here's using the local simulation with and without the USGS VS30 near-surface velocity model (background regional model from IRIS EMC LSP_Eucrust1.0, Lu et al. 2018)
#specfem3d example of computing the shaking of the 2004 Dec. 5 Waldkirch event (~Mw4.7) in the nearby city of Freiburg, Germany, by injecting the regional wavefield into a very small-scale local simulation (grid point spacing ~15m) - wavefield injection from regional into local SPECFEM3D
December 20, 2024 at 4:51 PM
#specfem3d example of computing the shaking of the 2004 Dec. 5 Waldkirch event (~Mw4.7) in the nearby city of Freiburg, Germany, by injecting the regional wavefield into a very small-scale local simulation (grid point spacing ~15m) - wavefield injection from regional into local SPECFEM3D
PGV shakemap for the Vanuatu Mw 7.3 #earthquake based on USGS finite-fault solution #specfem3d #shakemap
December 17, 2024 at 7:29 PM
PGV shakemap for the Vanuatu Mw 7.3 #earthquake based on USGS finite-fault solution #specfem3d #shakemap
2024-12-17 Vanuatu Mw 7.3 #earthquake - shakemovie simulation w/ USGS finite-fault solution and IRIS EMC GLAD-M35 (Cui et al. 2024) model #specfem3d #science #USGS #IRIS #blender #b3d
December 17, 2024 at 7:26 PM
2024-12-17 Vanuatu Mw 7.3 #earthquake - shakemovie simulation w/ USGS finite-fault solution and IRIS EMC GLAD-M35 (Cui et al. 2024) model #specfem3d #science #USGS #IRIS #blender #b3d
PGV shakemap for the 2024-04-02P Hualien City, Taiwan Mw 7.4 earthquake based on USGS finite-fault solution #specfem3d #earthquake #shakemap
December 7, 2024 at 7:11 PM
PGV shakemap for the 2024-04-02P Hualien City, Taiwan Mw 7.4 earthquake based on USGS finite-fault solution #specfem3d #earthquake #shakemap
remember - deadliest earthquakes in 2024
2024-04-02 Hualien City, Taiwan Mw 7.4 earthquake #specfem3d #science #earthquake
2024-04-02 Hualien City, Taiwan Mw 7.4 earthquake #specfem3d #science #earthquake
December 7, 2024 at 7:08 PM
remember - deadliest earthquakes in 2024
2024-04-02 Hualien City, Taiwan Mw 7.4 earthquake #specfem3d #science #earthquake
2024-04-02 Hualien City, Taiwan Mw 7.4 earthquake #specfem3d #science #earthquake
PGV shakemap for the 2024-01-01 Noto Mw 7.5 earthquake based on USGS finite-fault solution #specfem3d #earthquake #shakemap
December 7, 2024 at 7:04 PM
PGV shakemap for the 2024-01-01 Noto Mw 7.5 earthquake based on USGS finite-fault solution #specfem3d #earthquake #shakemap
remember - deadliest earthquakes in 2024
2024-01-01 Noto Mw 7.5 earthquake #specfem3d #science #earthquake
2024-01-01 Noto Mw 7.5 earthquake #specfem3d #science #earthquake
December 7, 2024 at 7:02 PM
remember - deadliest earthquakes in 2024
2024-01-01 Noto Mw 7.5 earthquake #specfem3d #science #earthquake
2024-01-01 Noto Mw 7.5 earthquake #specfem3d #science #earthquake
PGV shakemap for the Mendocino Mw 7.0 based on USGS finite-fault solution #specfem3d #earthquake #shakemap
December 7, 2024 at 6:52 PM
PGV shakemap for the Mendocino Mw 7.0 based on USGS finite-fault solution #specfem3d #earthquake #shakemap