Peak Cumulative (LOS)
-5.2 cm
Vertical Est. (39.1°)
-6.7 cm
3-Ref Sensitivity
[-5.2, -3.3] cm LOS
Rate (cm / 100 days)
-4.3 cm/100d
Annualized est.: -15.9 cm/yr
Latest Pair & Cumulative Summary
- Latest Consecutive Pair Step: -0.13 cm LOS (2026-10-04 to 2026-10-16 at p01: 29.559N 95.958W; cumulative at point: -5.22 cm)
- Affected Population (GHSL GHS-POP E2025, 108d eq., ≥ 0.71 cm 2σ): 430,616 residents (< -2 cm), 1,849 residents across 8.14 km² (< -5 cm).
Top 3 Most-Subsiding Areas
| Rank | 1 km Block Center (Lat, Lon) | Cumulative LOS | Rate |
|---|---|---|---|
| #1 | 29.5589, -95.9579 | -5.22 cm | -4.35 cm/100d |
| #2 | 29.7436, -95.6516 | -4.48 cm | -3.74 cm/100d |
| #3 | 29.7165, -95.5971 | -3.95 cm | -3.29 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 Houston subsided up to -5.2 cm LOS (-4.3 cm/100d) between 2026-06-18 and 2026-10-16, consistent with active seasonal compaction.
- About 430,616 residents live on ground sinking faster than 2 cm per 108 days (and 1,849 residents across 8.14 km2 faster than 5 cm per 108 days, above the 0.71 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).