USGS Professonal Paper 1096 - IRIS

HAWAII AND THE PACIFIC--Continued
Fwa Beach
HI
INSTRUMENTATION--Continued
Seismometer
Code Type Component To(sec)
Galvo
T g(sec)
Type
recording
Magnification
at T ,
Remarks
RON Geotecb 18300-------- NS,EW 1.0
Johnson-Matheson----- Z 1.0
--do----------------- Z 1.0
3prcugitcthet Z ,tiS ,E" 1~ Q
Helicorder
--do------
.2 --do------
3D 0 --do------
K, 10
K, 10
12.5 K
K 100 K
KIP Benioff-------------- Z .0
Beniof f -------------- .5 EW .0
Sprengnether--------- Z,NS,EW 15.0
Geotech 1200--------- Z 30.0
Geotech 1300--------- N5 30.0
--90----------------- FW 10 0
KKH Johnson-Matheson----- 2 1.0
KPH Benioff 4681--------- 2 1.0
HKH Johnson-Matheson----- 1.0
MOK Benioff 4681--------- Z 1.0
.75 Photo paper
.75 --do-------
100.0 --do-------
100.0 Photo paper,
Magnetic tape
100.0 --do---------
100.0 --do---------
Helicorder
.3 Helicorder,
16-rnm film.
Helicorder
.3 --do------
12.5 K
12.5 K
750
45.9 K, 665
37.8 K, 761
33.5 K, 611
1 K
11 K
K
11 K
WWSSN.
Do.
Do.
HGLP.
Do.
Do.
OPA --do----------------- 1.0
.3 --do-------
6.2 K
PUP --do----------------- Z 1.0
.3 --do-------
12.5 K
Timing system:
WWSSN standard.
System response curves: KIP--see figure 3, p. 364, and figure 6, p. 365. Others available from stations.
SHORT HISTORY
The Tsunami Warning System detects and locates major earthquakes 1n tne PaclflC reglou, deLelilliiles whether they have
generated tsunamis, and provides timely and effective tsunami information and warnings to the countries that might be
affected. New instrumental techniques were developed to permit visible recording of earthquilkes and triggering of alanns
for events above a certain magnitude. The first of these instruments were installed at USC&GS observatories in 1947 and
1948 "nd the alarms were added in 1950. The initial participating seismic- observatories were College and Sitka, Alaska;
Tucson, Ariz.; and Honolulu, Hawaii. In addition to the four original stations, the system now lncluaes Adak and Pallller,
Alaska; Berkeley and Pasadena, Calif.; Newport, Wash., and numerous stations throughout the Pacific region.
HON, established in 1902, has been in three locations in the southwest Oahu area: 1902-47--southwest 3 km of Ewa,
1947-60--at Barbers Point, 196o-present--Ewa Beacn.
KIP was started when the WWSSN system was installed.
PUP's instrumentation was moved to OPA when PUP closed in 1965.
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