( Y S T W C ),
Chief - Tatyana N. Ivelskaya, Zapadnaya str, 78 Yuzno-Sakhalinsk, 693000 Russian Federation (CIS)
24 hr phone: +7-424-2 42-36-91
1st alternate: +7-424-2 72-28-20
2nd alternate: +7-424-22 5-31-14
E-mail address: TWC@Sakhalin.ru
For the Russia, YSTWC has responsibility as National Tsunami Warning Center to provide tsunami warning service for any tsunami impacting Russia national interests. YSTWC predicts the tsunami arrival times, coastal impact if possible, and must provide timely and effective information and warnings to all national interests to minimize the hazards to human life and safety.
We can offer such catalogues:
(1) Catalogue of Warnings and Tsunami for Pacific Region starting with 1998;
(2) Earthquake data catalogue for the events with magnitude greater or equal 7.0 in Kuril-Kamchatka trench, Okhotskoye and Japan seas;
(3) Data catalogue for near source tsunami observed in Kurily isls and Sakhalin isl;
(4) Tsunami data catalogue for the events resulting due to distant quakes.
We are interested in receiving of immediate seismological and tsunami information, historical tsunami data.
Japanese scientists visit Sakhalin Tsunami Warning Center (October 14-28, 2004)
State and perspectives of
development for the Sakhalin operative tsunami warning service
(c)98, Tatiana N. Ivelskaya, Director of Sakhalin Tsunami Warning Center
OPTIMAL PLACEMENT OF TSUNAMI WARNING HYDROPHYSICAL STATIONS (Indian ocean)
(c)2005, Alexander A. Poplavsky, Vasily N. Khramushin
TSUNAMI WARNING SYSTEM IN RUSSIA
Tsunami Warning System (TWS) in Russia was organized in 1958, six years after destructive tsunami of November 4, 1952. Two departments are responsible for the TWS functioning: 1) Federal Service for Hydrometeorology and Environment Monitoring and 2) Geophysic Service of Russia Academy of Science (RAS).
Russia Far East TWS consists of three Regional Services: Sakhalin, Kamchatka and Primorye Services.
At the present stage of development of a science is not obviously possible to predict an earthquake but after one's occurring to some probability a tsunami generation is predictable.
In Sakhalin Region the TWS consists of Tsunami Warning Center (TWC) and Seismic Station of RAS Geophysical Service, both located in Yuzno-Sakhalinsk . The TWC's primary objective is to provide timely tsunami warnings , all clears and information to the people and organizations and also studying of tsunami phenomenon. The seismic station is responsible for Tsunami Warning issuance in case of near source quakes when epicentral distance is up to 3000 km from Yuzno-Sakhalinsk while TWC issues warnings based on tsunami information after occurring of major quakes in the Pacific with distance of more than 3000 km.
Issued Tsunami Warning transmits to Civil Defence and Emergency Regional Headquarters and to Central Telegraph Station of Yuzno-Sakhalinsk. TWC personnel after an occured earthquake computes tsunami arrival times for Sakhalin and Kuril Isls coastal places, then determines danger ending, issues all clear in all cases.
In accordance with international agreements in case of emergency Sakhalin TWC cooperates with TWC abroad
Sakhalin TWC prepares for Regional Emergency Commission an information about expected and real conditions after occurred underwater earthquake and an information about intensity and consequences of major quakes occurred on land.
For the period of 1958 - 1998 in Sakhalin and Kuril Isls there were registered 42 tsunami, 34 of them were generated in near-source zone (Kuril-Kamchatka Trench, Japan and Okhotsk seas) and 8 - in distant regions of the Pacific.
Tsunami waves are generated not in all cases of occurring of major earthquakes near coast but considering that generation probability is high, Tsunami Warning are issued always when magnitude is greater or equal threshold ( for the Kuril-Kamchatka Trenh, Japan and Okhotsk seas threshold is 7.0).
PHYSICS OF TSUNAMI
The phenomenon we call a tsunami is a series of extremely long waves with long period. These waves are primarily associated with earthquakes occurred under oceanic bottom or near coast. Volcanic eruptions, landslides, nuclear explosions and even outer space objects impacts can also generate tsunami. In the deep ocean tsunami speed can exceed 1000 km/hr , tsunami length from crest to crest may be a hundred kilometers or more while height may be only a few centimeters so people aboard cannot feel them.
When the tsunami enters the shoal parts of coastline, wave velocity rapidly diminishes and the wave height considerably increases. Just in these shallow waters tsunami becomes dangerous for life and property, its height may be from 30 up to 50 m or even more and tsunami strike becomes devastating. Tsunami is most dangerous for settlements situated inside V-shaped gulfs and bays when open part looks towards the ocean. In Kuril Isls 2-nd Kuril Strait (where Severo-Kurilsk is situated ) is similar to such bay. Great amount of water enters such bay striking coast and flooding rivers up to 2-3 km from coastline.
TSUNAMI SAFETY RULES
EARTHQUAKE SAFETY RULES
When an earthquake occurs, you may feel shocks during short time - from several seconds up to one minute. The shocks can frighten you but it's nothing to do how to wait their ending. If you'll act calmly and thoughtfully, you'll increase your chances to be rescued. Moreover, your calmness will be transferred to other peoples and will help them.
EARTHQUAKE INTENSITY SCALE
Our Internet e-mail address: TWC@Sakhalin.ru