NTWC-INCOIS-20120411-1613-003 (TYPE - II Supplementary 01) ---------------------------------------------------------------------------------- TSUNAMI BULLETIN NUMBER 3 INDIAN TSUNAMI EARLY WARNING CENTRE – INCOIS HYDERABAD (ITEWC) issued at: 1708 IST Wednesday 11 April 2012 ---------------------------------------------------------------------------------- ... POTENTIAL TSUNAMI THREAT FOR INDIAN COAST ... 1. EARTHQUAKE INFORMATION (Revised) ITEWC INCOIS detected an earthquake with the following preliminary information: Magnitude: 8.2 M (Great) Depth: 10 km Date: 11 Apr 2012 Origin Time: 1613 IST Latitude: 0.87 N Longitude: 92.49 E Location: off W Coast of Northern Sumatra 2. EVALUATION Earthquakes of this size sometimes have potential to generate tsunamis. However, so far there is no confirmation about the triggering of a tsunami. An investigation is under way to determine if a tsunami has been triggered. This ITEWC will monitor sea level gauges and report if any tsunami wave activity has occurred. Based on pre-run model scenarios, the zones listed below are POTENTIALLY UNDER THREAT. 3. TSUNAMI THREAT FOR THE INDIAN COAST The list below shows the forecast arrival time of the first wave estimated to exceed 0.02 m amplitude in case of "watch", 0.5 m amplitude in case of "Alert & Warning" at the beach in each zone, and the amplitude of the maximum beach wave predicted for the zone. Zones where the estimated wave amplitudes are less than 0.2m at the beach are not shown. The list is grouped by State (alphabetic order) and ordered according to the earliest estimated times of arrival at the beach. Please be aware that actual wave arrival times may differ from those below, and the initial wave may not be the largest. A tsunami is a series of waves and the time between successive waves can be five minutes to one hour. The threat is deemed to have passed two hours after the forecast time for last exceedance of the 0.5m threat threshold for a zone. As local conditions can cause a wide variation in tsunami wave action, CANCELLATION of national warnings and ALL CLEAR determination must be made by national/state/local authorities. INDIRA POINT GREAT & LITTLE NICOBAR ISLAND 1651IST 11 Apr 2012 1.7 m Alert KOMATRA & KATCHAL ISLAND 1701IST 11 Apr 2012 1.5 m Alert NICOBAR 1711IST 11 Apr 2012 0.8 m Alert LITTLE ANDAMAN 1736IST 11 Apr 2012 0.7 m Watch PORT BLAIR 1759IST 11 Apr 2012 0.7 m Watch HAVELOCK 1808IST 11 Apr 2012 0.4 m Watch NORTH SENTINEL ISLAND 1813IST 11 Apr 2012 0.6 m Watch DIGLIPUR 1823IST 11 Apr 2012 0.4 m Watch RANGATH BAY 1825IST 11 Apr 2012 0.5 m Watch CUDDALORE; PONDICHERRY; VILLUPURAM 1853IST 11 Apr 2012 0.7 m Watch KANCHIPURAM 1901IST 11 Apr 2012 0.6 m Watch NAGAPATTINAM TO RAMESHWARAM 1904IST 11 Apr 2012 0.6 m Watch KRISHNA 1908IST 11 Apr 2012 0.9 m Watch NELLORE 1908IST 11 Apr 2012 0.6 m Watch CHENNAI; TIRUVALLUR 1910IST 11 Apr 2012 0.6 m Watch PRAKASAM; GUNTUR 1912IST 11 Apr 2012 0.8 m Watch EAST & WEST GODAVARI 1913IST 11 Apr 2012 0.7 m Watch VISAKHAPATNAM; VIZIANAGARAM 1927IST 11 Apr 2012 0.6 m Watch SRIKAKULAM 1932IST 11 Apr 2012 0.6 m Watch KANYAKUMARI 1947IST 11 Apr 2012 0.5 m Watch TIRUNELVELI 2118IST 11 Apr 2012 0.6 m Watch THIRUVANANTHAPURAM 2123IST 11 Apr 2012 0.5 m Watch GANJAM 2133IST 11 Apr 2012 0.3 m Watch RAMANATHAPURAM SOUTH 2159IST 11 Apr 2012 0.4 m Watch TUTICORIN 2220IST 11 Apr 2012 0.5 m Watch PURI 2238IST 11 Apr 2012 0.4 m Watch WEST & LANDFALL ISLAND 2310IST 11 Apr 2012 0.3 m Watch JAGATSINGHAPUR 2357IST 11 Apr 2012 0.5 m Watch FLAT ISLAND 0016IST 12 Apr 2012 0.6 m Watch KENDRAPARA; BHADRAK; BALESHWAR 0044IST 12 Apr 2012 0.3 m Watch ALAPPUZHA 0103IST 12 Apr 2012 0.5 m Watch KOLLAM 0132IST 12 Apr 2012 0.4 m Watch AGATTI 0313IST 12 Apr 2012 0.3 m Watch ANDROTH 0323IST 12 Apr 2012 0.3 m Watch MALAPPURAM; THRISSUR; ERNAKULAM 0451IST 12 Apr 2012 0.3 m Watch KOZHIKODE 0550IST 12 Apr 2012 0.3 m Watch 4. ADVICE For regions under ALERT (Orange), public should be advised to avoid beaches and low-lying coastal areas. Vessels should move into deep ocean For regions under WATCH (Yellow), no immediate action is required This bulletin is being issued as advice. Only national/state/local authorities and disaster management officers have the authority to make decisions regarding the official threat and warning status in their coastal areas and any action to be taken in response. 5. UPDATES Additional bulletins will be issued by ITEWC INCOIS for this event as more information becomes available. 6. CONTACT INFORMATION Indian Tsunami Early Warning Centre (ITEWC) Indian National Centre for Ocean Information Services (INCOIS) Address:"Ocean Valley", Pragathi Nagar (BO), Nizampet (SO), Hyderabad - 500 090, India. Tel: 91-40-23895011 Fax: 91-40-23895012 Email: tsunami@incois.gov.in Website: www.incois.gov.in END OF BULLETIN ----------------------------------------------------------------------------------