| Alaska | ||||||
| EDM | GPS | Leveling | Tilt Meter | Dry Tilt | MAG | |
| Aniakchak Volcano | 1994 | |||||
| Augustine Island | 1988 1989 |
1992 1993 1995 1996 |
est.1992 | 1988 1989 |
||
| Katmai Volcano | 1989 1990 1993 |
1993 1995 |
||||
| Mount Redoubt | 1991 1992 |
|||||
| Washington State | ||||||
| EDM | GPS | Leveling | Tilt Meter | Dry Tilt | MAG | |
| Mount Baker | 1982 1983 |
1975 1977 1981 1983 |
||||
| Mount Rainier | 1982 1983 1988 1989 1994 |
1994 | 1982 1983 1988 |
|||
| Mount St. Helens | 1980 thru ongoing |
1992 1993 1997 permanent station established |
1981 thru 1985 |
1980 thru 1990 |
1981 thru 1985 |
1980 thru 1986 |
| Oregon | ||||||
| EDM | GPS | Leveling | Tilt Meter | Dry Tilt | MAG | |
| Crater Lake | 1982 1983 1984 1988 |
1985 1986 |
||||
| Mount Hood | 1983 1984 |
1983 1984 |
||||
| Newberry Caldera | 1985 1986 |
1985 1986 1994 |
||||
| South Sister | 1985 1986 |
2001 2002 installed two continuous stations 2001 |
1985 1986 2001 2002 |
|||
| California | ||||||
| EDM | GPS | Leveling | Tilt Meter | Dry Tilt | MAG | |
| Lassen Peak | 1981 1982 1984 |
1993 | 1981 1982 1984 |
|||
| Long Valley - Mammoth Mountain |
1989 | 1997 1998 1999 installed 14 continuous stations 1998-2001 |
1988 thru 1993 1995 1997 |
1982 | ||
| Medicine Lake | 1989 | 1990 | 1988 1989 1990 1999 |
|||
| Mount Shasta | 1981 1982 1984 |
1990 | 1981 1982 1984 |
|||
| Wyoming | ||||||
| EDM | GPS | Leveling | Tilt Meter | Dry Tilt | MAG | |
| Yellowstone Caldera | 1984 1987 |
1996 continuous GPS since 1999 |
1983 thru 1993 1995 1996 1998 |
|||
| -- Table info by Gene Iwatsubo, last updated: 2003 | ||||||
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