NTWC-INCOIS-20120411-1408-04 (TYPE - III Supplementary 01) ---------------------------------------------------------------------------------- TSUNAMI BULLETIN NUMBER 4 INDIAN TSUNAMI EARLY WARNING CENTRE – INCOIS HYDERABAD (ITEWC) issued at: 1548 IST Wednesday 11 April 2012 ---------------------------------------------------------------------------------- ... CONFIRMED TSUNAMI THREAT IN THE INDIAN COAST ... 1. EARTHQUAKE INFORMATION (Revised) ITEWC INCOIS detected an earthquake with the following preliminary information: Magnitude: 8.5 M (Great) Depth: 10 km Date: 11 Apr 2012 Origin Time: 1408 IST Latitude: 2.4 N Longitude: 93.07 E Location: off W Coast of Northern Sumatra 2. EVALUATION Sea level observations have confirmed that a TSUNAMI WAS GENERATED. Maximum wave amplitudes observed so far: STB01(India) 6.3N 88.8E 1447IST 11 Apr 2012 0.1m CampbellBay(India) 6.9N 93.7E 1512IST 11 Apr 2012 0.3m Sabang (Indonesia) 5.8N 95.3E 1515IST 11 Apr 2012 0.3m 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 1438IST 11 Apr 2012 3.9 m Warning KOMATRA & KATCHAL ISLAND 1448IST 11 Apr 2012 2.8 m Warning NICOBAR 1457IST 11 Apr 2012 1.7 m Alert LITTLE ANDAMAN 1520IST 11 Apr 2012 1.8 m Alert PORT BLAIR 1546IST 11 Apr 2012 1.5 m Alert HAVELOCK 1555IST 11 Apr 2012 0.9 m Alert NORTH SENTINEL ISLAND 1559IST 11 Apr 2012 1.5 m Alert DIGLIPUR 1611IST 11 Apr 2012 0.8 m Alert RANGATH BAY 1613IST 11 Apr 2012 1.1 m Alert CUDDALORE; PONDICHERRY; VILLUPURAM 1641IST 11 Apr 2012 1.6 m Alert KANCHIPURAM 1649IST 11 Apr 2012 1.7 m Alert NAGAPATTINAM TO RAMESHWARAM 1652IST 11 Apr 2012 1.2 m Alert KRISHNA 1656IST 11 Apr 2012 1.7 m Alert NELLORE 1656IST 11 Apr 2012 1.3 m Alert CHENNAI; TIRUVALLUR 1657IST 11 Apr 2012 1.2 m Alert EAST & WEST GODAVARI 1700IST 11 Apr 2012 1.6 m Alert PRAKASAM; GUNTUR 1700IST 11 Apr 2012 1.4 m Alert RAMANATHAPURAM SOUTH 1710IST 11 Apr 2012 1.0 m Alert VISAKHAPATNAM; VIZIANAGARAM 1713IST 11 Apr 2012 1.2 m Alert SRIKAKULAM 1717IST 11 Apr 2012 1.1 m Alert GANJAM 1727IST 11 Apr 2012 0.9 m Alert PURI 1731IST 11 Apr 2012 0.7 m Alert TIRUNELVELI 1732IST 11 Apr 2012 1.2 m Alert KANYAKUMARI 1737IST 11 Apr 2012 1.1 m Alert FLAT ISLAND 1744IST 11 Apr 2012 1.3 m Alert THIRUVANANTHAPURAM 1914IST 11 Apr 2012 1.0 m Alert KOLLAM 1930IST 11 Apr 2012 0.8 m Alert TUTICORIN 2003IST 11 Apr 2012 1.0 m Alert ALAPPUZHA 2053IST 11 Apr 2012 0.7 m Alert WEST & LANDFALL ISLAND 2057IST 11 Apr 2012 0.9 m Alert JAGATSINGHAPUR 2142IST 11 Apr 2012 0.7 m Alert KENDRAPARA; BHADRAK; BALESHWAR 2237IST 11 Apr 2012 0.6 m Alert ANDROTH 2241IST 11 Apr 2012 0.6 m Alert MALAPPURAM; THRISSUR; ERNAKULAM 0006IST 12 Apr 2012 0.6 m Alert AGATTI 0009IST 12 Apr 2012 0.7 m Alert AMINI 0038IST 12 Apr 2012 0.6 m Alert KOZHIKODE 0342IST 12 Apr 2012 0.6 m Alert NORTH & SOUTH GOA 0443IST 12 Apr 2012 0.5 m Alert PURBA MEDINIPUR; SOUTH & NORTH 24 PARGANAS 0502IST 12 Apr 2012 0.7 m Alert 4. ADVICE For regions under WARNING (RED), public should be advised to move in-land towards higher grounds. Vessels should move into deep ocean. 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 ----------------------------------------------------------------------------------