Data · dataset · 2026
Map Sheet 48 (2025 update) - Ground Motion from PGV (10% in 50 years)
Listed in California Open Data
This image service is part of a collection of maps for PGA, PGV and spectral accelerations at 0.2 s (SA02), 1.0 s (SA10), and 2.0 s (SA20) to illustrate seismic hazards in California.
Description
For each ground motion parameter, maps at two different hazard levels were presented: one with a 2% probability of being exceeded in 50 years (equivalent to 2,475-year recurrence interval) and the other with 10% probability of being exceeded in 50 years (equivalent to 475-year recurrence interval).
The ArcGIS Online interface allows users to select any two ground motion hazard maps to compare side by side. Ground motion parameters were calculated using the 2023 update of the U.S. Geological Survey National Seismic Hazard Model. See the “Scientific Background” on MS48 webpage for detailed information.
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Due to software limitations, symbology cannot be added to this service. To match the symbology used in the MS48 Ground Motion application , use the following configuration: Esri Color Ramp: Inferno Minimum: 6.8 cm/s Maximum: 269 cm/s Gamma: 1
Links
Get the data
- Publisher page gis-cnra.hub.arcgis.com/datasets/cadoc::map-sheet-48-2025-update-ground-motion-from-pg… ↗
documentation · download · from data ca gov
- ArcGIS GeoService gis.conservation.ca.gov/server/rest/services/CGS/MS48_GroundMotion_PGV_10pc50/ImageSer… ↗
download · from data ca gov
Where it is published
- California Open Data dataset page data.ca.gov/dataset/map-sheet-48-2025-update-ground-motion-from-pgv-10-in-… ↗
landing page · from data ca gov
Catalogue records · 1
- CKAN API data.ca.gov/api/3/action/package_show?id=c82c8683-7197-4b49-a4f2-eed25a396… ↗
metadata API · from data ca gov
Topics
- Stated by source
- Natural Resources
- From keywords
- Earth & Environmental Science
- Inferred from text
- Image 75%
Provenance · 1 source records, 10 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| California Open Data | c82c8683-7197-4b49-a4f2-eed25a396bf6 | 8 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · data ca gov | connector:data_ca_gov@1.0.0 | |
| concepts[field].local:field:earth-environmental | mapping · data ca gov | connector:data_ca_gov@1.0.0 | |
| concepts[modality].local:modality:image | enrichment · data ca gov | keyword-concept-rules@1.0.0 | title+description (75%) |
| concepts[topic].ckan_group:data_ca_gov:natural-resources | source · data ca gov | connector:data_ca_gov@1.0.0 | |
| created_date | source · data ca gov | connector:data_ca_gov@1.0.0 | |
| description | source · data ca gov | connector:data_ca_gov@1.0.0 | /notes |
| license_text | source · data ca gov | connector:data_ca_gov@1.0.0 | |
| publication_date | source · data ca gov | connector:data_ca_gov@1.0.0 | |
| title | source · data ca gov | connector:data_ca_gov@1.0.0 | /title |
| updated_date | source · data ca gov | connector:data_ca_gov@1.0.0 |