Although this release does not perfectly reproduce Nath & Thingbaijam (2012), there is generally good agreement, and there are no known outstanding differences in the inputs.
This release makes the following changes with respect to v1.1:
- Several stable continental regions (zones 75, 81, 923, 924) were restored to the model after observing hazard much lower than published values in these areas. They were unintentionally omitted upon generation of NRML source files because the focal mechanism was undefined.
- Some TRT assignments were revised, upon consultation with KKST, after observing hazard much higher than published values in these areas:
- zone 13 (subduction interface => active shallow crust)
- zone 169 (interface ==> intraslab)
- Hypocentral depths were revised. The v0 model continues to assume hypocentral depths at mid-layer. The v1 model now sets the hypocentral depths as follows: uppermost layer, 15 km, remaining layers at the top of each layer. This is what KKST believes his original model implemented. Compare
to
- Added per-areal-source discretization, and increased it, for large, deep and/or oceanic zones, from 10 km to 20 km (zone 917 on layer 1 in the Bay of Bengal, 932, 933 on layer 2 and 166, 167, 935 on layer 3) or 50 km (zones 936 on layer 3 and 172 on layer 4).
Among the binaries are compressed job files, including source models. See Jobs for an explanation of the differences between the jobs.
A map of the ratio of v1.2 to published hazard values for PGA, SA(0.1), SA(1.0) at 2% and 10% in 50 years can be viewed at . Hazard curves for selected cities are plotted at
.
The PGA at 10% in 50 years for selected cities varies from +25% to -45% with respect to the published values:
| City | NT2012 [g] | A2018 [g] | Error [g] | Error [%] |
|---|---|---|---|---|
| Srinagar | 0.33 | 0.414 | 0.08 | 25 |
| Dehradun | 0.47 | 0.528 | 0.06 | 12 |
| Port Blair | 0.71 | 0.774 | 0.06 | 9 |
| New Delhi | 0.24 | 0.224 | -0.02 | -7 |
| Koyna | 0.47 | 0.43 | -0.04 | -8 |
| Imphal | 0.68 | 0.593 | -0.09 | -13 |
| Bangalore | 0.11 | 0.095 | -0.02 | -14 |
| Guwahati | 0.66 | 0.558 | -0.1 | -16 |
| Hyderabad | 0.09 | 0.072 | -0.02 | -20 |
| Kolkata | 0.15 | 0.114 | -0.04 | -24 |
| Bhuj | 0.42 | 0.316 | -0.1 | -25 |
| Shillong | 0.72 | 0.528 | -0.19 | -27 |
| Patna | 0.13 | 0.093 | -0.04 | -29 |
| Chennai | 0.12 | 0.084 | -0.04 | -30 |
| Mumbai | 0.16 | 0.112 | -0.05 | -30 |
| Jabalpur | 0.19 | 0.124 | -0.07 | -34 |
| Ahmedabad | 0.11 | 0.066 | -0.04 | -40 |
| Thiruvananthapuram | 0.07 | 0.039 | -0.03 | -45 |