java.lang.Object
- java.lang.Enum<Imt>
- - gov.usgs.earthquake.nshmp.gmm.Imt

All Implemented Interfaces:

Serializable, Comparable<Imt>
```
public enum Imt
extends Enum<Imt>
```
Intesity measure type (Imt) identifiers. SA0P1 stands for spectal acceleration of 0.1 seconds.

Author:

U.S. Geological Survey

Enum Constant Summary

Enum Constants
Enum Constant	Description
`AI`
`ASI`
`CAV`
`DS575`
`DS595`
`DSI`
`PGA`
`PGD`
`PGV`
`SA0P01`
`SA0P02`
`SA0P025`
`SA0P03`
`SA0P04`
`SA0P05`
`SA0P06`
`SA0P07`
`SA0P075`
`SA0P08`
`SA0P09`
`SA0P1`
`SA0P12`
`SA0P14`
`SA0P15`
`SA0P16`
`SA0P17`
`SA0P18`
`SA0P2`
`SA0P25`
`SA0P3`
`SA0P35`
`SA0P4`
`SA0P45`
`SA0P5`
`SA0P6`
`SA0P7`
`SA0P75`
`SA0P8`
`SA0P9`
`SA10P0`
`SA1P0`
`SA1P25`
`SA1P5`
`SA2P0`
`SA2P5`
`SA3P0`
`SA3P5`
`SA4P0`
`SA4P5`
`SA5P0`
`SA6P0`
`SA7P5`
`SI`

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`double`	`frequency()`	Returns the frequency (in Hz) for this `Imt`.
`static Imt`	`fromPeriod(double period)`	Returns the spectral acceleration `Imt` associated with the supplied period.
`boolean`	`isSA()`	Returns true if this `Imt` represents a spectral acceleration.
`static Set<Imt>`	`mprsImts()`	Returns the `Set` of multi-period response spectra IMTs used in building code applications.
`double`	`period()`	Returns the corresponding period for this `Imt` if it represents a spectral acceleration and throws an `UnsupportedOperationException` otherwise.
`static Set<Imt>`	`saImts()`	Returns the `Set` of spectral acceleration IMTs.
`String`	`toString()`
`String`	`units()`	Return the units in which this `Imt` is measured.
`static Imt`	`valueOf(String name)`	Returns the enum constant of this type with the specified name.
`static Imt[]`	`values()`	Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum
clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, valueOf

Methods inherited from class java.lang.Object
getClass, notify, notifyAll, wait, wait, wait

- Enum Constant Detail
  - PGA
```
public static final Imt PGA
```
  - PGV
```
public static final Imt PGV
```
  - PGD
```
public static final Imt PGD
```
  - ASI
```
public static final Imt ASI
```
  - SI
```
public static final Imt SI
```
  - DSI
```
public static final Imt DSI
```
  - CAV
```
public static final Imt CAV
```
  - DS575
```
public static final Imt DS575
```
  - DS595
```
public static final Imt DS595
```
  - AI
```
public static final Imt AI
```
  - SA0P01
```
public static final Imt SA0P01
```
  - SA0P02
```
public static final Imt SA0P02
```
  - SA0P025
```
public static final Imt SA0P025
```
  - SA0P03
```
public static final Imt SA0P03
```
  - SA0P04
```
public static final Imt SA0P04
```
  - SA0P05
```
public static final Imt SA0P05
```
  - SA0P06
```
public static final Imt SA0P06
```
  - SA0P07
```
public static final Imt SA0P07
```
  - SA0P075
```
public static final Imt SA0P075
```
  - SA0P08
```
public static final Imt SA0P08
```
  - SA0P09
```
public static final Imt SA0P09
```
  - SA0P1
```
public static final Imt SA0P1
```
  - SA0P12
```
public static final Imt SA0P12
```
  - SA0P14
```
public static final Imt SA0P14
```
  - SA0P15
```
public static final Imt SA0P15
```
  - SA0P16
```
public static final Imt SA0P16
```
  - SA0P17
```
public static final Imt SA0P17
```
  - SA0P18
```
public static final Imt SA0P18
```
  - SA0P2
```
public static final Imt SA0P2
```
  - SA0P25
```
public static final Imt SA0P25
```
  - SA0P3
```
public static final Imt SA0P3
```
  - SA0P35
```
public static final Imt SA0P35
```
  - SA0P4
```
public static final Imt SA0P4
```
  - SA0P45
```
public static final Imt SA0P45
```
  - SA0P5
```
public static final Imt SA0P5
```
  - SA0P6
```
public static final Imt SA0P6
```
  - SA0P7
```
public static final Imt SA0P7
```
  - SA0P75
```
public static final Imt SA0P75
```
  - SA0P8
```
public static final Imt SA0P8
```
  - SA0P9
```
public static final Imt SA0P9
```
  - SA1P0
```
public static final Imt SA1P0
```
  - SA1P25
```
public static final Imt SA1P25
```
  - SA1P5
```
public static final Imt SA1P5
```
  - SA2P0
```
public static final Imt SA2P0
```
  - SA2P5
```
public static final Imt SA2P5
```
  - SA3P0
```
public static final Imt SA3P0
```
  - SA3P5
```
public static final Imt SA3P5
```
  - SA4P0
```
public static final Imt SA4P0
```
  - SA4P5
```
public static final Imt SA4P5
```
  - SA5P0
```
public static final Imt SA5P0
```
  - SA6P0
```
public static final Imt SA6P0
```
  - SA7P5
```
public static final Imt SA7P5
```
  - SA10P0
```
public static final Imt SA10P0
```
- Method Detail
  - values
```
public static Imt[] values()
```
    Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:
    for (Imt c : Imt.values()) System.out.println(c);
    Returns:
    
    an array containing the constants of this enum type, in the order they are declared
  - valueOf
```
public static Imt valueOf(String name)
```
    Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)
    
    Parameters:
    
    name - the name of the enum constant to be returned.
    
    Returns:
    
    the enum constant with the specified name
    
    Throws:
    
    IllegalArgumentException - if this enum type has no constant with the specified name
    
    NullPointerException - if the argument is null
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Enum<Imt>
  - units
```
public String units()
```
    Return the units in which this Imt is measured.
  - period
```
public double period()
```
    Returns the corresponding period for this Imt if it represents a spectral acceleration and throws an UnsupportedOperationException otherwise. Rather than trying to catch the exception, users should call isSA() to check validity of this Imt before calling this method.
    
    Returns:
    
    the period for this Imt if it represents a spectral acceleration
    
    Throws:
    
    UnsupportedOperationException - if this Imt is not a spectral acceleration
  - fromPeriod
```
public static Imt fromPeriod(double period)
```
    Returns the spectral acceleration Imt associated with the supplied period. Due to potential floating point precision problems, this method internally checks values to within a small tolerance.
    
    Parameters:
    
    period - for Imt
    
    Returns:
    
    an Imt, or null if no Imt exsists for the supplied period
  - frequency
```
public double frequency()
```
    Returns the frequency (in Hz) for this Imt. PGA returns 100 Hz, spectral periods return their expected value (1 / period), and PGV and PGD throw exceptions.
    
    Returns:
    
    the frequency associated with this Imt
    
    Throws:
    
    UnsupportedOperationException - if called on PGV or PGD
  - isSA
```
public boolean isSA()
```
    Returns true if this Imt represents a spectral acceleration.
    
    Returns:
    
    true if this is a spectral acceleration Imt, false otherwise
  - saImts
```
public static Set<Imt> saImts()
```
    Returns the Set of spectral acceleration IMTs.
    
    Returns:
    
    the set of spectral acceleration IMTs
  - mprsImts
```
public static Set<Imt> mprsImts()
```
    Returns the Set of multi-period response spectra IMTs used in building code applications.
    [ PGA, 0.01s, 0.02s, 0.03s, 0.05s, 0.075s, 0.1s, 0.15s, 0.2s, 0.25s, 0.3s, 0.4s, 0.5s, 0.75s, 1.0s, 1.5s, 2.0s, 3.0s, 4.0s, 5.0s, 7.5s, 10.0s ]}
    Returns:
    
    the set of multi-period response spectra IMTs

Enum Imt

Enum Constant Summary

Method Summary

Methods inherited from class java.lang.Enum

Methods inherited from class java.lang.Object

Enum Constant Detail

PGA

PGV

PGD

ASI

SI

DSI

CAV

DS575

DS595

AI

SA0P01

SA0P02

SA0P025

SA0P03

SA0P04

SA0P05

SA0P06

SA0P07

SA0P075

SA0P08

SA0P09

SA0P1

SA0P12

SA0P14

SA0P15

SA0P16

SA0P17

SA0P18

SA0P2

SA0P25

SA0P3

SA0P35

SA0P4

SA0P45

SA0P5

SA0P6

SA0P7

SA0P75

SA0P8

SA0P9

SA1P0

SA1P25

SA1P5

SA2P0

SA2P5

SA3P0

SA3P5

SA4P0

SA4P5

SA5P0

SA6P0

SA7P5

SA10P0

Method Detail

values

valueOf

toString

units

period

fromPeriod

frequency

isSA

saImts

mprsImts