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ArcGIS JavaScript
ArcGIS Online Map Viewer
ArcGIS Earth
Service Description: The California Geological Survey (CGS) Map Sheet 48 (MS48) provides a depiction of expected ground shaking intensity from future earthquakes across the state. The shaking intensity is represented using the Modified Mercalli Intensity (MMI) scale, which describes the perceived earthquake shaking and correlates strongly with earthquake-induced damage. MS48 maps the level of shaking with a 2% probability of being exceeded in 50 years, equivalent to a 2,475-year average recurrence interval.
In addition to MS48, eight interactive MMI hazard maps are presented. These include MMIs calculated using alternative methods. For each method, MMIs 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 Arc GIS interface allows users to select any two MMI hazard maps to compare side by side. MMI values were calculated using several ground motion to intensity conversion equations (GMICEs). See the “Scientific Background” on MS48 webpage for detailed information.
Due to software limitations, symbology cannot be added to this service. To match the symbology used in the MS48 MMI application, use the following configuration: - Number of Classes: 7
- Classes & Hex Codes:
- 4 - 5: #ffffbf
- 5 - 6: #f5f500
- 6 - 7: #f7ce00
- 7 - 8: #fa7d00
- 8 - 9: #fd2a00
- 9 - 10: #c70808
- 10 - 11: #8c0808
Name: CGS/MS48_MMI_PGV_10pc50
Description:
Single Fused Map Cache: false
Extent:
XMin: -1.3849234917776056E7
YMin: 3833592.1169994827
XMax: -1.2704934917776056E7
YMax: 5162392.116999483
Spatial Reference: 102100
(3857)
LatestVCSWkid(0)
Initial Extent:
XMin: -1.3849234917776056E7
YMin: 3833592.1169994827
XMax: -1.2704934917776056E7
YMax: 5162392.116999483
Spatial Reference: 102100
(3857)
LatestVCSWkid(0)
Full Extent:
XMin: -1.3849234917776056E7
YMin: 3833592.1169994827
XMax: -1.2704934917776056E7
YMax: 5162392.116999483
Spatial Reference: 102100
(3857)
LatestVCSWkid(0)
Pixel Size X: 100.0
Pixel Size Y: 100.0
Band Count: 1
Pixel Type: F32
RasterFunction Infos: {"rasterFunctionInfos": [{
"name": "None",
"description": "",
"help": ""
}]}
Mensuration Capabilities: Basic
Has Histograms: true
Has Colormap: false
Has Multi Dimensions : false
Rendering Rule:
Min Scale: 0
Max Scale: 0
Copyright Text: Rui Chen, 2025, Map Sheet 48: Earthquake Shaking Potential for California, California Geological Survey, California Department of Conservation.
Service Data Type: esriImageServiceDataTypeGeneric
Min Values: 5.508943557739258
Max Values: 9.722916603088379
Mean Values: 7.356052765850799
Standard Deviation Values: 0.8291849563730744
Object ID Field:
Fields:
None
Default Mosaic Method: Center
Allowed Mosaic Methods:
SortField:
SortValue: null
Mosaic Operator: First
Default Compression Quality: 75
Default Resampling Method: Bilinear
Max Record Count: null
Max Image Height: 4100
Max Image Width: 15000
Max Download Image Count: null
Max Mosaic Image Count: null
Allow Raster Function: true
Allow Copy: true
Allow Analysis: true
Allow Compute TiePoints: false
Supports Statistics: false
Supports Advanced Queries: false
Use StandardizedQueries: true
Raster Type Infos:
Name: Raster Dataset
Description: Supports all ArcGIS Raster Datasets
Help:
Has Raster Attribute Table: false
Edit Fields Info: null
Ownership Based AccessControl For Rasters: null
Child Resources:
Info
Histograms
Statistics
Key Properties
Legend
Raster Function Infos
Supported Operations:
Export Image
Identify
Measure
Compute Histograms
Compute Statistics Histograms
Get Samples
Compute Class Statistics
Query Boundary
Compute Pixel Location
Compute Angles
Validate
Project