Skip to content
Snippets Groups Projects
Commit cd8c9ec9 authored by Powers, Peter M.'s avatar Powers, Peter M.
Browse files

Merge branch 'readme-info-update' into 'main'

cleaned up readmes and model info for v6 tag

See merge request !123
parents f1c7bf6c bca44918
No related branches found
No related tags found
1 merge request!123cleaned up readmes and model info for v6 tag
# NSHM: Conterminous U.S. # NSHM: Conterminous US
National Seismic Hazard Model (NSHM) for the conterminous U.S. This model is intended for use with National Seismic Hazard Model (NSHM) for the conterminous U.S. This model is intended for use with
U.S. Geological Survey (USGS) hazard software [*nshmp-haz*][1]. U.S. Geological Survey (USGS) hazard software [_nshmp-haz_][1].
For details on the format of this model, see the *nshmp-haz* For details on the format of this model, see the _nshmp-haz_
[user guide and implementation reference][2]. [user guide and implementation reference][2].
## Model Editions ## Model Editions
* For prior models, see the [USGS Seismic Hazard Maps][3] web page. - For prior models, see the [USGS Seismic Hazard Maps][3] web page.
* Current edition: 2018, version [5.1.0][4] with IPDS record: IP-139140. - 2018 edition, version [5.1.0][4] with IPDS record: IP-139140.
- 2023 edition (current), version [6.0.0][8] with IPDS record: IP-TBD
## Site Files ## Site Files
The `map.geojson` file defines the latitude-longitude range over which the USGS computes The `map.geojson` file defines the latitude-longitude range over which the USGS computes
maps of seismic hazard from this model. The `sites.geojson` and `sites.csv` files maps of seismic hazard from this model. The `sites.geojson` and `sites.csv` files
contain the test sites at which the USGS performs more detailed comparisons between model editions. contain the test sites at which the USGS performs more detailed comparisons between model editions.
See the *nshmp-haz* user guide [site specification section][5] for more details on these files. See the _nshmp-haz_ user guide [site specification section][5] for more details on these files.
## References ## References
**Model documentation:** Petersen, M.D, Shumway, A.M., Powers, P.M., Mueller, C.S., Moschetti, **Model documentation:** Petersen MD, Shumway AM, Powers PM, Field EH, Moschetti MP, Jaiswal KS,
M.P., Frankel, A.D., Rezaeian, S., McNamara, D.E., Luco, N., Boyd, O.S., Rukstales, K.S., Jaiswal, Milner KR, Rezaeian S, Frankel AD, Llenos AL, Michael AJ, Altekruse AM, Ahdi SK, Withers KB,
K.S., Thompson, E.M., Hoover, S.M., Clayton, B.S., Field, E.H., and Zeng, Y., 2020, The 2018 Mueller CS, Zeng Y, Chase RE, Salditch LM, Luco N, Rukstales KS, Herrick JA, Girot DL, Aagaard BT,
update of the U.S. National Seismic Hazard Model: Overview of model and implications, _Earthquake Bender AM, Briggs RW, Boyd OS, Clayton BS, DuRoss CB, Evans EL, Haeussler PJ, Hatem AE, Haynie KL,
Spectra_, 36(1) p. 5–41, doi: [10.1177/8755293019878199][6]. Hearn EH, Johnson KM, Kortum ZA, Kwong NS, Makdisi AJ, Mason HB, McNamara DE, McPhillips DF,
Okubo PG, Page MT, Pollitz FF, Rubinstein JL, Shaw BE, Shen Z-K, Shiro BR, Smith JA,
Stephenson WJ, Thompson EM, Thompson Jobe JA, Wirth EA and Witter RC (2023) The 2023 US 50-state
National Seismic Hazard Model: Overview and implications. _Earthquake Spectra_ 40(1): 1–84,
doi: [10.1177/87552930231215428][6].
**Suggested citation:** Powers, P.M. and Altekruse, J.M., 2022, nshm-conus: National Seismic **Suggested citation:** Powers, P.M. and Altekruse, J.M., 2022, nshm-conus: National Seismic
Hazard Model for the conterminous U.S. U.S. Geological Survey software release, doi: Hazard Model for the conterminous U.S. U.S. Geological Survey software release, doi:
...@@ -35,5 +40,6 @@ Hazard Model for the conterminous U.S. U.S. Geological Survey software release, ...@@ -35,5 +40,6 @@ Hazard Model for the conterminous U.S. U.S. Geological Survey software release,
[3]: https://www.usgs.gov/programs/earthquake-hazards/seismic-hazard-maps-and-site-specific-data [3]: https://www.usgs.gov/programs/earthquake-hazards/seismic-hazard-maps-and-site-specific-data
[4]: https://code.usgs.gov/ghsc/nshmp/nshms/nshm-conus/-/tree/5.1.0 [4]: https://code.usgs.gov/ghsc/nshmp/nshms/nshm-conus/-/tree/5.1.0
[5]: https://code.usgs.gov/ghsc/nshmp/nshmp-haz/-/blob/main/docs/pages/Site-Specification.md [5]: https://code.usgs.gov/ghsc/nshmp/nshmp-haz/-/blob/main/docs/pages/Site-Specification.md
[6]: https://doi.org/10.1177/8755293019878199 [6]: https://doi.org/10.1177/87552930231215428
[7]: https://doi.org/10.5066/P9J1OVR6 [7]: https://doi.org/10.5066/P9J1OVR6
[8]: https://code.usgs.gov/ghsc/nshmp/nshms/nshm-conus/-/tree/6.0.0
# Western U.S. Fault System # Western U.S. Fault System
This directory contains the currently in-development fault system solution that spans This directory contains the branch averaged fault system solution that spans
the entire Western U.S. (OpenSHA UCERF3 inversion methodology). the entire western U.S. devloped using the OpenSHA UCERF3 inversion methodology.
See: <https://data.opensha.org/nshm23/reports/reports.html>
...@@ -24,5 +24,7 @@ the 2014 and 2018 conterminous U.S. NSHM as detailed in the table below. ...@@ -24,5 +24,7 @@ the 2014 and 2018 conterminous U.S. NSHM as detailed in the table below.
## 2023 ## 2023
Although `grid-config.json` defines focal mechanism ratios, they are overridden by ratios The 2023 NSHM switches to using purely incremental MFDs for gridded seismicity in the Western
specified in fault system grid MFD files. U.S. The MFDs are derived from the branch-averaged gridded seismicity model that accompanies
the western U.S. fault-system solution. Although `grid-config.json` defines focal mechanism
ratios, they are overridden by ratios specified in fault system grid MFD files.
# Conterminous U.S. Seismicity Catalogs # Conterminous U.S. Seismicity Catalogs
For each update of the conterminous U.S. (CONUS) National Seismic Hazard Model (NSHM), For each update of the conterminous U.S. (CONUS) National Seismic Hazard Model (NSHM),
seismicity catalogs (full and declustered) are developed as input to the smoothed seismicity catalogs (full and declustered) are developed as input to the smoothed
seismicity model. Catalogs are developed separately for the central and eastern U.S. seismicity model. Catalogs are developed separately for the central and eastern U.S.
(CEUS) and western U.S. (WUS) due to different input catalogs as well as magnitude (CEUS) and western U.S. (WUS) due to different catalog properties (e.g. magnitude
conversions. conversions, completeness levels).
Development of the seismicity catalogs include: Development of the seismicity catalogs include:
- reformatting and combining pre-existing input catalogs, - Reformatting and combining pre-existing input catalogs,
- deleting duplicates, explosions, and mining-related events, - Deleting duplicates, explosions, and mining-related events,
- flagging induced events in the CEUS, and - Flagging induced events in the CEUS, and
- delivering a final uniform moment magnitude catalog for further processing - Delivering a final uniform moment magnitude catalog for further processing (i.e., declustering).
(i.e., declustering).
[Mueller (2019)][1] outlines the full set of catalog processing steps in further detail. See [Mueller (2019)][1] for details on catalog processing.
## Model Editions
* Current edition: 2023, version [6.b.1][2] with IPDS record: IP-######.
## References ## References
**Catalog documentation:** Mueller, C.S., 2019, Earthquake catalogs for the USGS National **Catalog processing:** Mueller, C.S., 2019, Earthquake catalogs for the USGS
Seismic Hazard Maps, _Seismological Research Letters_, 90(1) p. 251–261, doi: [10.1785/0220170108][1]. National Seismic Hazard Maps, _Seismological Research Letters_, 90(1) p. 251–261,
doi: [10.1785/0220170108][1].
**Data release:** Petersen et al. (2023) _Data Release for the 2023 U.S. 50-State
National Seismic Hazard Model - Overview_ (US Geological Survey data release).
DOI: [10.5066/P9GNPCOD][2].
[1]: https://doi.org/10.1785/0220170108 [1]: https://doi.org/10.1785/0220170108
[2]: https://code.usgs.gov/ghsc/nshmp/nshms/nshm-conus/-/tags/6.b.1 [2]: https://doi.org/10.5066/P9GNPCOD
{ {
"name": "NSHM Conterminous U.S. 2023 (beta)", "name": "NSHM Conterminous U.S. 2023",
"site-class-vs30": { "site-class-vs30": {
"AB": 1500, "A": 1500,
"B": 1080, "B": 1080,
"BC": 760, "BC": 760,
"C": 530, "C": 530,
......
# Site Data # Site Data
This directory contains data and information required by GMMs to enable site or region specific This directory contains data and information required by GMMs to enable site or region specific
behavior. The `basin` directory contains <i>z</i><sub>1.0</sub> and <i>z</i><sub>2.5</sub> values behavior. The `basin` directory contains _z_1.0 and _z_2.5 values for western U.S. basins. The
for Western U.S. basins. The `margin` directory contains sediment thickness, <i>z<sub>Sed</sub></i> `margin` directory contains sediment thickness, _zSed_ data for the Gulf and Atlantic coastal
data for the Gulf and Atlantic coastal plains. The `gmm-region` directory defines areas over which plains. The `gmm-region` directory defines areas over which region-specific behavior may be
region-specific behavior may be applied in a GMM. applied in a GMM.
## Margin ## Margin
- TODO Earthquake Spectra citation - Documentation: <https://doi.org/10.1177/87552930231204880>
- Data Release (zSed): https://doi.org/10.5066/P9EBOWU8 - Data Release (zSed): <https://doi.org/10.5066/P9EBOWU8>
## Tapering ## Tapering
......
...@@ -19,8 +19,8 @@ should be the same as for 2014. ...@@ -19,8 +19,8 @@ should be the same as for 2014.
## 2014 IDs ## 2014 IDs
* Numbers in brackets indicate the numeric zones assigned in the legacy fortran input files. - Numbers in brackets indicate the numeric zones assigned in the legacy fortran input files.
* The `default` zone covers everywhere outside the identified tectonic/geologic provinces. - The `default` zone covers everywhere outside the identified tectonic/geologic provinces.
### Polygon IDs ### Polygon IDs
...@@ -64,7 +64,5 @@ should be the same as for 2014. ...@@ -64,7 +64,5 @@ should be the same as for 2014.
## 2023 Updates ## 2023 Updates
- Multiple declustering methods considered (gk, nn, r85) - Multiple declustering methods considered (gk, nn, r85).
- Adaptive/fixed smoothing weights changed from 40/60 to 50/50, consistent with `active-crust` - Rates being used in model are total catalog rates, not declustered rates.
- rates being used in model are total catalog rates, not declustered rates.
- TODO update 2023 ID's
...@@ -10,17 +10,10 @@ The single (a.k.a. 'characteristic') magnitude frequency distributions for the d ...@@ -10,17 +10,10 @@ The single (a.k.a. 'characteristic') magnitude frequency distributions for the d
and combinations thereof are based on the magnitude (area) scaling relations listed below, and combinations thereof are based on the magnitude (area) scaling relations listed below,
in order of increasing implied magnitude, and are identified as follows: in order of increasing implied magnitude, and are identified as follows:
* `M1`: Strasser et al. (2010) - `M1`: Strasser et al. (2010)
* `M2`: Murotani et al. (2008) - `M2`: Murotani et al. (2008)
* `M3`: Papazachos et al. (2004) - `M3`: Papazachos et al. (2004)
- `M4`: Shaw (c = 4.0)
Alternative magnitude scaling relations:
* `M4`: Shaw (c = 3.9)
* `M5`: Shaw (c = 4.0)
* `M6`: Shaw (c = 4.1)
* `M7`: Blaser
* `M8`: Allen-Hayes
Cascadia uses two different Gutenberg–Richter MFD's, one with `b=0.0`, and one with `b=1.0`, Cascadia uses two different Gutenberg–Richter MFD's, one with `b=0.0`, and one with `b=1.0`,
both of which are used to float ruptures on the 'full' and models spanning the 3 southern sections. both of which are used to float ruptures on the 'full' and models spanning the 3 southern sections.
...@@ -32,8 +25,8 @@ subduction zone. Therefore there is no weighting between the 'full' and 'partial ...@@ -32,8 +25,8 @@ subduction zone. Therefore there is no weighting between the 'full' and 'partial
the logic tree defined in Fig. 63 of Petersen et al. (2014). `source-groups` are used to define the logic tree defined in Fig. 63 of Petersen et al. (2014). `source-groups` are used to define
additive branches and to supply scale factors. additive branches and to supply scale factors.
* Original full and segmented files: `sub[0|1|2|3|4]_ch_[bot|mid|top].in` - Original full and segmented files: `sub[0|1|2|3|4]_ch_[bot|mid|top].in`
* Original unsegmented files: `sub[0|1]_GRb[0|1]_[bot|mid|top].in` - Original unsegmented files: `sub[0|1]_GRb[0|1]_[bot|mid|top].in`
## Section ID Groupings ## Section ID Groupings
...@@ -52,15 +45,14 @@ TODO: Most likely will change the rupture ID's for 2023. Replace in table. ...@@ -52,15 +45,14 @@ TODO: Most likely will change the rupture ID's for 2023. Replace in table.
## Rupture Reference (2023) ## Rupture Reference (2023)
The table below lists the section IDs used for rupture sets on branches of the 2023 The table below lists the section IDs used for rupture sets on branches of the 2023
Cascadia logic tree. The Full and Unsegmented ruptures remain the same but the Segmented Cascadia logic tree. The Full and Unsegmented ruptures remain the same but the Segmented
ruptures now have a GEA12 branch (same as 2014/2018) and a GEA17 branch. Sections have ruptures now have a GEA12 branch (same as 2014/2018) and a GEA17 branch. Sections have
also been split into 50-km subsections (e.g., 2014/2018 Section 1 is now 7 50-km sections also been split into 50-km subsections (e.g., 2014/2018 Section 1 is now 7 50-km sections
[1-1:1-7], Section 2 is now 3 50-km sections [2-1:2-3], Section 3 is now 3 50-km sections [1-1:1-7], Section 2 is now 3 50-km sections [2-1:2-3], Section 3 is now 3 50-km sections
[3-1:3-3], and Section 4 is now 9 50-km sections [4-1:4-9]). All section IDs have been [3-1:3-3], and Section 4 is now 9 50-km sections [4-1:4-9]). All section IDs have been
updated, and new rupture IDs have been assigned. updated, and new rupture IDs have been assigned.
| Sections | 1-1:1-7 | 2-1:2-3 | 3-1:3-3 | 4-1:4-9 | | | Sections | 1-1:1-7 | 2-1:2-3 | 3-1:3-3 | 4-1:4-9 | |
|:----------------------------------- |:----------:|:----------:|:----------:|:----------:|:--------------------------:| |:----------------------------------- |:----------:|:----------:|:----------:|:----------:|:--------------------------:|
| Bottom | 3200..3206 | 3207..3209 | 3210..3212 | 3213..3221 | | | Bottom | 3200..3206 | 3207..3209 | 3210..3212 | 3213..3221 | |
...@@ -76,7 +68,7 @@ updated, and new rupture IDs have been assigned. ...@@ -76,7 +68,7 @@ updated, and new rupture IDs have been assigned.
| Segmented, GEA17, D, 1-1:1:6 | ◆◆◆◆◆◆◇ | | | | [ 100702, 100701, 100700 ] | | Segmented, GEA17, D, 1-1:1:6 | ◆◆◆◆◆◆◇ | | | | [ 100702, 100701, 100700 ] |
| Segmented, GEA17, C', 1-1:2-3 | ◆◆◆◆◆◆◆ | ◆◆◆ | | | [ 100202, 100201, 100200 ] | | Segmented, GEA17, C', 1-1:2-3 | ◆◆◆◆◆◆◆ | ◆◆◆ | | | [ 100202, 100201, 100200 ] |
| Segmented, GEA17, C, 1-1:3-2 | ◆◆◆◆◆◆◆ | ◆◆◆ | ◆◆◇ | | [ 100602, 100601, 100600 ] | | Segmented, GEA17, C, 1-1:3-2 | ◆◆◆◆◆◆◆ | ◆◆◆ | ◆◆◇ | | [ 100602, 100601, 100600 ] |
| Segmented, GEA17, B, 1-1:4-3 | ◆◆◆◆◆◆◆ | ◆◆◆ | ◆◆◆ | ◆◆◆◇◇◇◇◇◇ | [ 100502, 100501, 100500 ] | | Segmented, GEA17, B, 1-1:4-3 | ◆◆◆◆◆◆◆ | ◆◆◆ | ◆◆◆ | ◆◆◆◇◇◇◇◇◇ | [ 100502, 100501, 100500 ] |
| Segmented, GEA17, F, 3-3:4-4 | | | ◇◇◆ | ◆◆◆◆◇◇◇◇◇ | [ 100902, 100901, 100900 ] | | Segmented, GEA17, F, 3-3:4-4 | | | ◇◇◆ | ◆◆◆◆◇◇◇◇◇ | [ 100902, 100901, 100900 ] |
| Unsegmented, GEA12-B, 1-1:3-3 | ◆◆◆◆◆◆◆ | ◆◆◆ | ◆◆◆ | | [ 100102, 100101, 100100 ] | | Unsegmented, GEA12-B, 1-1:3-3 | ◆◆◆◆◆◆◆ | ◆◆◆ | ◆◆◆ | | [ 100102, 100101, 100100 ] |
| Unsegmented, GEA12-A, 1-1:4-9 | ◆◆◆◆◆◆◆ | ◆◆◆ | ◆◆◆ | ◆◆◆◆◆◆◆◆◆ | [ 100002, 100001, 100000 ] | | Unsegmented, GEA12-A, 1-1:4-9 | ◆◆◆◆◆◆◆ | ◆◆◆ | ◆◆◆ | ◆◆◆◆◆◆◆◆◆ | [ 100002, 100001, 100000 ] |
...@@ -95,9 +87,6 @@ updated, and new rupture IDs have been assigned. ...@@ -95,9 +87,6 @@ updated, and new rupture IDs have been assigned.
| Unsegmented, 1-2-3 | ◆ | ◆ | ◆ | | [ 3160, 3161, 3162 ] | | Unsegmented, 1-2-3 | ◆ | ◆ | ◆ | | [ 3160, 3161, 3162 ] |
| Unsegmented, 1-2-3-4 | ◆ | ◆ | ◆ | ◆ | [ 3170, 3171, 3172 ] | | Unsegmented, 1-2-3-4 | ◆ | ◆ | ◆ | ◆ | [ 3170, 3171, 3172 ] |
TODO: Most likely will change the rupture ID's for 2023. Replace in table.
## Cluster Model (2023) ## Cluster Model (2023)
Table of clusters and relevant section ranges. The various combinations of ruptures below, each Table of clusters and relevant section ranges. The various combinations of ruptures below, each
......
...@@ -6,31 +6,31 @@ were used. Early implementations kept the individual slices separate in the logi ...@@ -6,31 +6,31 @@ were used. Early implementations kept the individual slices separate in the logi
With the move to using variable depth spatial PDFs for 2023, the 2014/2018 model was refactored With the move to using variable depth spatial PDFs for 2023, the 2014/2018 model was refactored
to combine the depth slices. to combine the depth slices.
The 2014/2018 Oregon grid is 50/50 Gaussian fixed kernel smoothing and fixed rate grid. These branches have The 2014/2018 Oregon grid is 50/50 Gaussian fixed kernel smoothing and fixed rate grid. These
been combined in the OR rate files. branches have been combined in the OR rate files.
## Polygon Depths and IDs ## Polygon Depths and IDs
| Grouping (Depth: id) | CA | OR | WA | | Grouping (Depth: id) | CA | OR | WA |
|:---------------------- |:------------------:|:------------------:|:------------------:| |:---------------------|:--------------:|:--------------:|:--------------:|
| 2008 | 50 km: 8200 | 50 km: 8210 | 50 km: 8220 | | 2008 | 50 km: 8200 | 50 km: 8210 | 50 km: 8220 |
| 2014 Shallow | <s>39 km: 8201</s> | <s>42 km: 8211</s> | <s>42 km: 8221</s> | | 2014 Shallow | 39 km: 8201 | 42 km: 8211 | 42 km: 8221 |
| 2014 Middle | <s>46 km: 8202</s> | <s>50 km: 8212</s> | <s>50 km: 8222</s> | | 2014 Middle | 46 km: 8202 | 50 km: 8212 | 50 km: 8222 |
| 2014 Deep | <s>60 km: 8203</s> | <s>60 km: 8213</s> | <s>60 km: 8223</s> | | 2014 Deep | 60 km: 8203 | 60 km: 8213 | 60 km: 8223 |
| 2014/2018 refactored | variable: 8200 | variable: 8210 | variable: 8220 | | 2014/2018 refactored | variable: 8200 | variable: 8210 | variable: 8220 |
## Rupture Set IDs ## Rupture Set IDs
Oregon and Washington intraslab MFDs are split into high and low branches, each with unique Oregon and Washington intraslab MFDs are split into high and low branches, each with unique
*b*-values and corresponding *a*-values. *b*-values and corresponding *a*-values.
| State: MFD | Shallow | Middle | Deep | var | | State: MFD | Shallow | Middle | Deep | var |
|:---------------------------------|:-----------:|:-----------:|:-----------:|:-----:| |:---------------------------------|:-------:|:------:|:----:|:----:|
| __CA:__ M 5.0-7.2 b=0.8 | <s>8204</s> | <s>8205</s> | <s>8206</s> | 8201 | | __CA:__ M 5.0-7.2 b=0.8 | 8204 | 8205 | 8206 | 8201 |
| __OR:__ M 6.5-7.2 b=0.4 (lo) | <s>8214</s> | <s>8216</s> | <s>8218</s> | 8211 | | __OR:__ M 6.5-7.2 b=0.4 (lo) | 8214 | 8216 | 8218 | 8211 |
| __OR:__ M 7.2-7.5,8.0 b=0.8 (hi) | <s>8215</s> | <s>8217</s> | <s>8219</s> | 8212 | | __OR:__ M 7.2-7.5,8.0 b=0.8 (hi) | 8215 | 8217 | 8219 | 8212 |
| __WA:__ M 5.0-7.2 b=0.4 (lo) | <s>8224</s> | <s>8226</s> | <s>8228</s> | 8221 | | __WA:__ M 5.0-7.2 b=0.4 (lo) | 8224 | 8226 | 8228 | 8221 |
| __WA:__ M 7.2-7.5,8.0 b=0.8 (hi) | <s>8225</s> | <s>8227</s> | <s>8229</s> | 8222 | | __WA:__ M 7.2-7.5,8.0 b=0.8 (hi) | 8225 | 8227 | 8229 | 8222 |
## Source Tree IDs ## Source Tree IDs
......
0% Loading or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment