Hilo (Hawaii) Site History
History Summary
| Station Name | Hilo, Hawaii |
|---|---|
| Latitude | 19° 43.8' N |
| Longitude | 155° 03.4' W |
| Country | USA |
| GLOSS No. | 287 |
| Time Reference | GMT (hours 00-23) |
| Contributor | National Ocean Service (NOS) (1973+) National Ocean. and Atmos. Administration (NOAA) US Coastal Geodetic Survey (1927-1972) |
| Instrument Type | Standard mechanical (1927-1974) Analog-to-digital (ADR) recorder (1975-1990) Aquatrak acoustic gauge, NOAA Next Generation Water Level Measuring System (NGWLMS) (1991-2000) |
| Site of Gauge | |
| Observational Period | 1927 - 2000 |
| Reference Level | All heights have been referred to the station tide staff zero which is linked to fixed benchmarks. |
Location Note
Please note that the position information has been altered in this document - see document 83916.
Tide Gauge Benchmark (TGBM) Description
Benchmark 4 (1951) is the primary benchmark (PBM) stamped 'NO 4 1951' set in top of east corner of northern-most concrete foundation which rests on solid rock for elevated water tank on Port of Hilo property.
Auxiliary Benchmarks
9 additional benchmarks are levelled to the TGBM and the Tide Station on a yearly basis
Benchmark Relationships
| Benchmark | Description |
|---|---|
| TGBM | 15.30ft above Tide Gauge Zero (Station Datum) |
| NOAA | Chart Datum (MLLW) is 3.69ft above Station Datum Mean Sea Level (1960-1978) is 4.86ft above Station Datum |
Quality Assessment by the UH Sea Level Center
Comments
The hourly residuals reveal a possible reference level shift on 12 September, 1974 (-8 cm). However, the shift is not evident in the daily means or with differences with daily means of Kahului. Otherwise, the daily and monthly means reveal no apparent reference level changes or trends.
The data for 1997-2000 were supplied with heights relative to MLLW. Consequently 1152mm was added to refer the data to tide gauge zero.
The data for 1998-2000 were supplied in non-GMT format and had to be shifted into GMT.
Notable episodic events:
- 04-06 November 1952: Tsunami from Kamchatka
- 09-10 March 1957: Tsunami from C. Aleutians
- 23-25 May 1960: Tsunami from S.C. Chile
- 28 March 1964: Tsunami from Alaska
| Year | CI (%) | Missing Data | Replaced Gaps or Bad Data | Fluctuations Questionable |
|---|---|---|---|---|
| (10)186-(09)187 (23)193-(16)194 (01)210-(09)210 | ||||
| 1928 | 100 | None | (10)016-(09)017 (10)251-(09)252 (10)264-(09)265 (10)310-(09)311 | None |
| 1929 | 100 | None | (10)066-(17)066 (10)154-(09)155 (13)303-(22)303 | None |
| 1930 | 100 | None | (00)006-(20)006 | None |
| 1931 | 100 | None | (23)252-(07)253 (21)279-(04)280 (10)304-(23)304 (01)305-(09)305 | None |
| 1932 | 48 | 139-141,183-366 | (10)149-(09)150 | None |
| 1933 | 0 | 1-365 | None | None |
| 1934 | 0 | 1-365 | None | None |
| 1935 | 0 | 1-365 | None | None |
| 1936 | 0 | 1-366 | None | None |
| 1937 | 0 | 1-365 | None | None |
| 1938 | 0 | 1-365 | None | None |
| 1939 | 0 | 1-365 | None | None |
| 1940 | 0 | 1-366 | None | None |
| 1941 | 0 | 1-365 | None | None |
| 1942 | 0 | 1-365 | None | None |
| 1943 | 0 | 1-365 | None | None |
| 1944 | 0 | 1-366 | None | None |
| 1945 | 0 | 1-365 | None | None |
| 1946 | 8 | 1-335 | None | None |
| 1947 | 100 | None | (10)099-(09)100 (09)275-(16)275 | None |
| 1948 | 100 | None | (21)102-(06)103 | None |
| 1949 | 100 | None | None | None |
| 1950 | 96 | 342-347,353-354,358-365 | (06)352-(17)352 | None |
| 1951 | 99 | 1 | None | None |
| 1952 | 100 | None | None | None |
| 1953 | 100 | None | (10)043-(21)043 | None |
| 1954 | 98 | 351-359 | None | None |
| 1955 | 100 | None | (20)327-(07)328 | None |
| 1956 | 100 | None | None | None |
| 1957 | 100 | None | None | None |
| 1958 | 100 | None | None | None |
| 1959 | 100 | None | None | None |
| 1960 | 100 | None | (13)343-(23)343 (22)349-(08)350 (07)354-(18)354 | None |
| 1961 | 98 | 323-325,328-332 | (10)333-(09)334 | None |
| 1962 | 88 | 213-215,219-220,226-239,248-274 | (02)145-(18)145 | 49 |
| 1963 | 100 | None | None | None |
| 1964 | 100 | None | None | None |
| 1965 | 100 | None | (21)007-(04)008 | 35 |
| 1966 | 100 | None | None | None |
| 1967 | 100 | None | None | None |
| 1968 | 100 | None | (12)137-(21)137 (00)292-(09)292 | None |
| 1969 | 100 | None | (22)020-(07)021 | None |
| 1970 | 100 | None | (02)020-(09)020 | None |
| 1971 | 100 | None | (02)138-(10)138 | None |
| 1972 | 100 | None | None | None |
| 1973 | 100 | None | None | 215,302 |
| 1974 | 100 | None | None | 6-7,42-43,66-67 |
| 1975 | 91 | 1-32 | None | 84,332-334 |
| 1976 | 94 | 189-198,207-211, 247-251,312-314 | (00)021-(15)021 (02)324-(15)324 (01)325-(23)325 | 184-185 |
| 1977 | 99 | 73-77 | (10)274-(18)274 | None |
| 1978 | 98 | 200-205 | None | None |
| 1979 | 100 | None | None | None |
| 1980 | 100 | None | None | None |
| 1981 | 98 | 335-341 | None | None |
| 1982 | 100 | None | None | None |
| 1983 | 100 | None | None | None |
| 1984 | 100 | None | None | 296 |
| 1985 | 100 | None | None | None |
| 1986 | 100 | None | None | None |
| 1987 | 100 | None | None | None |
| 1988 | 100 | None | None | None |
| 1989 | 100 | None | None | None |
| 1990 | 100 | None | None | None |
| 1991 | 100 | None | None | None |
| 1992 | 100 | None | (22)046-(23)047 (15)062-(18)063 | None |
| 1993 | 100 | None | None | None |
| 1994 | 100 | None | None | None |
| 1995 | 100 | None | None | None |
| 1996 | 100 | None | None | None |
| 1997 | 100 | None | None | None |
| 1998 | 100 | None | None | None |
| 1999 | 100 | None | None | None |
| 2000 | 100 | None | None | 5-10,18-23,36-42, 120-136,142-163, 168- 173,180-203 |
