Abstract Seismic attenuation tomography is used to map fluids and fractures beneath the Aluto volcano geothermal field of the Main Ethiopian Rift. We present 3D models of peak delay (Δlog10Tpd ${\Delta }{\log }{10}\left({T}{pd}\right)$) and inverse coda quality factor (Qc−1 ${Q}{c}^{-1}$) which are proxies for seismic scattering and absorption. High Qc−1 ${Q}{c}^{-1}$ anomalies are observed near productive geothermal wells with high‐temperature gradients and in areas of hydrothermal activity. High scattering attenuation anomalies are spatially associated with faults and fractures that serve as pathways for fluid flow. These variations correlate well with production variations in boreholes across the geothermal field. Furthermore, a prominent high‐scattering (low‐absorption) anomaly is observed at a depth of approximately 0–3 km below sea level (bsl) beneath Aluto, which is interpreted as the signature of an intrusive igneous body. Together, these methods for measuring seismic attenuation serve as valuable tools in geothermal exploration, offering constraints on fluid distribution, as well as structural and lithological variations.
Observations from the Little Bunker
Last updated: October 16, 2025 04:11 AM
Atmospheric CO₂
424.4 ppm
+18.2
ppm/year
Atmospheric CH₄
1933.54 ppb
+12.29
ppb/year
Global Temperature
+1.48 °C
Peak: +1.73°C
World Population
8.1 billion
+67
million/year