NTWC-INCOIS-20120411-1408-002 (TYPE - II) ---------------------------------------------------------------------------------- TSUNAMI BULLETIN NUMBER 2 INDIAN TSUNAMI EARLY WARNING CENTRE – INCOIS HYDERABAD (ITEWC) issued at: 1420 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: 8.7 (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 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. 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 1425IST 11 Apr 2012 6.3 m Warning KOMATRA & KATCHAL ISLAND 1438IST 11 Apr 2012 5.3 m Warning NICOBAR 1448IST 11 Apr 2012 3.0 m Warning LITTLE ANDAMAN 1510IST 11 Apr 2012 2.8 m Alert NORTH SENTINEL ISLAND 1517IST 11 Apr 2012 2.4 m Alert PORT BLAIR 1532IST 11 Apr 2012 2.8 m Alert HAVELOCK 1541IST 11 Apr 2012 1.6 m Watch WEST & LANDFALL ISLAND 1541IST 11 Apr 2012 1.5 m Watch FLAT ISLAND 1543IST 11 Apr 2012 2.4 m Alert RANGATH BAY 1557IST 11 Apr 2012 1.6 m Watch DIGLIPUR 1557IST 11 Apr 2012 1.4 m Watch CUDDALORE; PONDICHERRY; VILLUPURAM 1633IST 11 Apr 2012 2.7 m Alert KANCHIPURAM 1640IST 11 Apr 2012 3.0 m Alert NAGAPATTINAM TO RAMESHWARAM 1643IST 11 Apr 2012 2.1 m Alert NELLORE 1646IST 11 Apr 2012 2.1 m Alert KRISHNA 1647IST 11 Apr 2012 2.7 m Alert CHENNAI; TIRUVALLUR 1648IST 11 Apr 2012 2.1 m Alert PRAKASAM; GUNTUR 1651IST 11 Apr 2012 2.8 m Alert EAST & WEST GODAVARI 1651IST 11 Apr 2012 2.3 m Alert TUTICORIN 1658IST 11 Apr 2012 1.7 m Watch RAMANATHAPURAM SOUTH 1659IST 11 Apr 2012 1.7 m Watch VISAKHAPATNAM; VIZIANAGARAM 1702IST 11 Apr 2012 2.1 m Alert SRIKAKULAM 1702IST 11 Apr 2012 1.8 m Watch PURI 1704IST 11 Apr 2012 1.3 m Watch JAGATSINGHAPUR 1707IST 11 Apr 2012 1.4 m Watch GANJAM 1715IST 11 Apr 2012 1.5 m Watch TIRUNELVELI 1716IST 11 Apr 2012 2.3 m Alert KENDRAPARA; BHADRAK; BALESHWAR 1718IST 11 Apr 2012 1.0 m Watch KOLLAM 1725IST 11 Apr 2012 1.3 m Watch THIRUVANANTHAPURAM 1726IST 11 Apr 2012 1.7 m Watch KANYAKUMARI 1730IST 11 Apr 2012 1.8 m Watch MINICOY 1734IST 11 Apr 2012 0.9 m Watch ALAPPUZHA 1735IST 11 Apr 2012 1.5 m Watch ANDROTH 1747IST 11 Apr 2012 1.2 m Watch PURBA MEDINIPUR; SOUTH & NORTH 24 PARGANAS 1750IST 11 Apr 2012 1.0 m Watch KAVARATTI 1800IST 11 Apr 2012 0.8 m Watch AGATTI 1808IST 11 Apr 2012 1.2 m Watch MALAPPURAM; THRISSUR; ERNAKULAM 1809IST 11 Apr 2012 1.2 m Watch AMINI 1812IST 11 Apr 2012 0.9 m Watch KOZHIKODE 1830IST 11 Apr 2012 1.1 m Watch KANNUR 1841IST 11 Apr 2012 0.8 m Watch KASARAGOD 1845IST 11 Apr 2012 0.7 m Watch SINDHUDURG 1956IST 11 Apr 2012 0.7 m Watch UTTAR KANNADA 1958IST 11 Apr 2012 1.1 m Watch NORTH & SOUTH GOA 1958IST 11 Apr 2012 0.9 m Watch RATNAGIRI 2017IST 11 Apr 2012 0.6 m Watch UDUPI; DAKSHIN KANNADA 2030IST 11 Apr 2012 0.9 m Watch PORBANDAR 0115IST 12 Apr 2012 0.4 m Watch RAIGAD 0117IST 12 Apr 2012 0.6 m Watch JAMNAGAR 0119IST 12 Apr 2012 0.6 m Watch JUNAGADH; DIU 0119IST 12 Apr 2012 0.5 m Watch MUMBAI; THANE 0134IST 12 Apr 2012 0.5 m Watch KUTCH 0135IST 12 Apr 2012 0.4 m Watch BHAVNAGAR; KHEDA; BHARUCH; SURAT; VALSAD 0239IST 12 Apr 2012 0.5 m Watch AMRELI 0251IST 12 Apr 2012 0.4 m Watch 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 ----------------------------------------------------------------------------------