Name: Shaking Intensity (MMI value)
Display Field: ShakingIntensity
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: When this layer is turned on, click on any area of the map to view the total population, occupied housing units, number of businesses, and number of employees exposed to each shaking intensity. These estimates are provided for the county clicked.The Modified Mercalli Intensity (MMI) scale is a seismic scale used for measuring the intensity of an earthquake. It measures the effects of an earthquake on the earth’s surface, humans, objects in nature, and the building environment. The scale ranges from 1 (not felt) to 12 (total destruction), often expressed as Roman numerals I through XII. Following is a detailed description of MMI shaking intensity levels: MMI 4: Vibration felt like passing of heavy trucks. Stopped cars rock. Hanging objects swing. Windows, dishes, doors rattle. glasses clink. In the upper range of IV, wooden walls and frames creak. MMI 5: Pictures move. Felt outdoors. Sleepers wakened. Liquids disturbed, some spilled. Small unstable objects displaced or upset. Doors swing. Pictures move. Pendulum clocks stop. MMI 6: Objects fall. Felt by all. People walk unsteadily. Many frightened. Windows crack. Dishes, glassware, knickknacks, and books fall off shelves. Pictures off walls. Furniture moved or overturned. Weak plaster, adobe buildings, and some poorly built masonry buildings cracked. Trees and bushes shake visibly. MMI 7: Nonstructural damage. Difficult to stand or walk. Noticed by drivers of cars. Furniture broken. Damage to poorly built masonry buildings. Weak chimneys broken at roof line. Fall of plaster, loose bricks, stones, tiles, cornices, unbraced parapets and porches. Some cracks in better masonry buildings. Waves on ponds. MMI 8: Moderate damage. Steering of cars affected. Extensive damage to unreinforced masonry buildings, including partial collapse. Fall of some masonry walls. Twisting, falling of chimneys and monuments. Wood-frame houses moved on foundations if not bolted; loose partition walls thrown out. Tree branches broken. (MMI descriptions taken from quake.abag.ca.gov/shaking/mmi/plaintext/.)
Service Item Id: 54cb7315236844b5b19d99de8263ca08
Copyright Text:
Default Visibility: true
MaxRecordCount: 2000
Supported Query Formats: JSON, geoJSON, PBF
Min Scale: 0.0
Max Scale: 0.0
Supports Advanced Queries: true
Supports Statistics: true
Has Labels: false
Can Modify Layer: true
Can Scale Symbols: false
Use Standardized Queries: true
Supports Datum Transformation: true
Extent:
XMin: 600546.3464543074
YMin: 81834.60810406506
XMax: 2273331.644577801
YMax: 1348520.7456584722
Spatial Reference: 2927
(2927)
LatestVCSWkid(0)
Drawing Info:
Renderer:
Unique Value Renderer:
Field 1: ShakingIntensity
Field 2: N/A
Field 3: N/A
Field Delimiter: ,
Default Symbol:
Default Label: N/A
UniqueValueInfos:
-
Value: 4
Label: 4 - Light
Description: N/A
Symbol:
Style: esriSFSSolid
Color: [114, 223, 255, 255]
Outline:
-
Value: 5
Label: 5 - Moderate
Description: N/A
Symbol:
Style: esriSFSSolid
Color: [143, 188, 143, 255]
Outline:
-
Value: 6
Label: 6 - Strong
Description: N/A
Symbol:
Style: esriSFSSolid
Color: [245, 245, 153, 255]
Outline:
-
Value: 7
Label: 7 - Very Strong
Description: N/A
Symbol:
Style: esriSFSSolid
Color: [255, 165, 0, 255]
Outline:
-
Value: 8
Label: 8 - Severe
Description: N/A
Symbol:
Style: esriSFSSolid
Color: [255, 69, 0, 255]
Outline:
-
Value: 9
Label: 8 - Severe
Description: N/A
Symbol:
Style: esriSFSSolid
Color: [255, 69, 0, 255]
Outline:
Transparency: 0
Labeling Info:
Advanced Query Capabilities:
Supports Statistics: true
Supports OrderBy: true
Supports Distinct: true
Supports Pagination: true
Supports TrueCurve: true
Supports Returning Query Extent: true
Supports Query With Distance: true
Supports Sql Expression: true
Supports Query With ResultType: false
Supports Returning Geometry Centroid: false
Supports Binning LOD: false
Supports Query With LOD Spatial Reference: false
Supports Percentile Statistics: true
Supports Having Clause: true
Supports Count Distinct: true
Supports Time Relation: true
Supports Sql Format: false
Supports Query Analytic: false
Supports Query With Current User: true
HasZ: false
HasM: false
Has Attachments: false
HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText
Type ID Field: null
Fields:
-
OBJECTID
(
type: esriFieldTypeOID, alias: objectid_1
)
-
shape
(
type: esriFieldTypeGeometry, alias: shape
)
-
CountyName
(
type: esriFieldTypeString, alias: County Name, length: 20
)
-
ShakingIntensity
(
type: esriFieldTypeSmallInteger, alias: Shaking Intensity (MMI value)
)
-
Population
(
type: esriFieldTypeInteger, alias: Population effected by shaking
)
-
Businesses
(
type: esriFieldTypeInteger, alias: Businesses effected by shaking
)
-
Employees
(
type: esriFieldTypeInteger, alias: Employees effected by shaking
)
-
Occupied_Housing_Units
(
type: esriFieldTypeInteger, alias: Occupied housing units effected by shaking
)
-
shape_Length
(
type: esriFieldTypeDouble, alias: shape_Length
)
-
shape_Area
(
type: esriFieldTypeDouble, alias: shape_Area
)
Supported Operations:
Query
Query Attachments
Query Analytic
Generate Renderer
Return Updates
Iteminfo
Thumbnail
Metadata