Peak Cumulative (LOS)
-8.6 cm
Vertical Est. (40.3°)
-11.3 cm
3-Ref Sensitivity
[-8.6, -6.0] cm LOS
Rate (cm / 100 days)
-7.2 cm/100d
Annualized est.: -26.3 cm/yr
Latest Pair & Cumulative Summary
- Latest Consecutive Pair Step: +1.05 cm LOS (2026-10-05 to 2026-10-17 at p01: 36.296N 59.661E; cumulative at point: -8.63 cm)
- Affected Population (GHSL GHS-POP E2025, 108d eq., ≥ 0.63 cm 2σ): 2,506,805 residents (< -2 cm), 793,351 residents across 112.65 km² (< -5 cm).
Top 3 Most-Subsiding Areas
| Rank | 1 km Block Center (Lat, Lon) | Cumulative LOS | Rate |
|---|---|---|---|
| #1 | 36.2958, 59.6615 | -8.63 cm | -7.19 cm/100d |
| #2 | 36.3249, 59.6161 | -7.57 cm | -6.31 cm/100d |
| #3 | 36.3547, 59.5360 | -7.27 cm | -6.06 cm/100d |
Top 5 At-Risk Infrastructure Segments
Infrastructure corridor ranking (OSM canal/road overlay) has not been computed for this regional subset yet.
GNSS Comparison & Calibration Status
Continuous GNSS time-series validation was not bundled for this regional subset.
Cumulative Displacement Map
What This Means
- Ground in Mashhad (Iran) subsided up to -8.6 cm LOS (-7.2 cm/100d) between 2026-06-19 and 2026-10-17, consistent with active seasonal compaction.
- About 2,506,805 residents live on ground sinking faster than 2 cm per 108 days (and 793,351 residents across 112.65 km2 faster than 5 cm per 108 days, above the 0.63 cm 2-sigma noise floor).
- No local GNSS or canal-tilt overlay is bundled for this subset; field inspection and local piezometer records are needed to confirm infrastructure impacts.
Calibration & Quality Notice (PROVISIONAL): NISAR data are provisional. Calibration and validation are carried out by the NISAR project (NASA-JPL and ISRO), not by our team.
Sources: NASA-ISRO NISAR L2 GUNW (CRID P05023 via ASF DAAC); GHSL GHS-POP E2025 R2023A (JRC, CC BY 4.0); Nevada Geodetic Laboratory GNSS; OpenStreetMap (ODbL).
Sources: NASA-ISRO NISAR L2 GUNW (CRID P05023 via ASF DAAC); GHSL GHS-POP E2025 R2023A (JRC, CC BY 4.0); Nevada Geodetic Laboratory GNSS; OpenStreetMap (ODbL).