Rabaul (Papua New Guinea) Site History
|Country||Papua New Guinea|
|Latitude||04° 12.0' S|
|Longitude||152° 10.5' E|
|Time Reference||GMT (hours 00-23)|
|Contributors||University of Hawaii Sea Level Center
Flinders University of South Australia (1966-1971 data)
|Instrument Type|| (1966-71 unconfirmed)
1. (1974-present) Leupold and Stevens Analog-to-Digital Recorder (ADR)
2. (10/1984-present) Handar Encoder (ENC)
|Site of Gauge||The gauge is situated just off the main wharf.|
|Observational periods||1966 - present|
All heights have been referred to the station tide staff zero which is linked to fixed bench marks.
|BM RL 303||A Department of Lands and Survey brass plate, with a pin, stamped 'RL No 303' is located at the north east corner of the old copra, north of Wreck Wharf, 300 yards from the tide gauge.|
|BM RL 431||A Department of Lands and Survey brass plate, with a pin, stamped 'RL No 431', is located at the corner of Malaguna Road and Coastwatchers Road, on the north west side of centre island along top of the curbing.|
|UH-1||A stainless steel disc 1.25 inches in diameter set in white epoxy, was established by the Oceanography Dept., University of Hawaii. It is situated 4 feet north of the tide staff, at centre of the curb, on Main Wharf.|
|US C&GS BM 1||A standard brass US C&GS benchmark, marked 'No.1 1948', is set in the top of a low stone wall at the seaward end of Namanula Street.|
|Moresby BM||The centre of a standard RAN hydrographic branch circular brass triangulation plate, marked 'HMAS Moresby 1941', is set into a stone seawall by the swimming pool at the seaward end of Namanula St.|
|Tide Gauge Zero (TGZ)||2.996m|
|US C&GS BM 1||3.057m
Datum of data is tide gauge zero.
NOTE: Rabaul is located in a seismically active region.
Quality Assessment by the UH Sea Level Centre
The daily and monthly means reveal no apparent changes in the reference level and agree with Kapingamarangi.
A volcanic eruption on 30 September, 1994 resulted in heavy subsidence until October 1. Based on geodetic leveling information provided by local authorities, -13 cm were added to the October 1994 data and -14 were added to the November 1994 data.
A spike on 17 February 1996 is associated with a tsunami.
|Year||CI(%)||Missing Data||Replaced Gaps or Bad Data||Questionable Fluctuations|
|1967||100||none||(02)326-(10)326 (02)327-(09)327 (01)329-(12)329 (02)332-(12)332 (19)333-(08)334 (01)335-(08)335 (22)335-(09)336(23)336-(09)337||50-53,213-217|