Sources LocationSubmarine Mass Failure 1 72.21 W , 39.22 NSubmarine Mass Failure 2 71.46 W , 39.70 NSubmarine Mass Failure 3 73.19 W, 38.41 NSubmarine Mass Failure 4 73.60 W, 38.10 N

Puerto Rico Trench Zone (M=9.0) Caribbean Subduction ZoneAzores Convergence Zone(M=8.6-9.0) Azores Gibraltar plate boundaryCumbre Vieja volcanic (CVV) collapse Canary Islands

Local sources

Distant Sources

USGS TNM - National Structures Dataset; USGS TNM - National Transportation Dataset; TomTom Commercial Roads; U.S. Census Bureau - TIGER/Line; USGS TNM - National Boundaries Dataset; USGS TNM - GeographicNames Information System; USGS TNM - National Hydrography Dataset

75°3'0"W

75°3'0"W

75°6'0"W

75°6'0"W

75°9'0"W

75°9'0"W

38°27'0"N 38°27'0"N

38°24'0"N 38°24'0"N

38°21'0"N 38°21'0"N

38°18'0"N 38°18'0"N

TSUNAMI INUNDATION MAPFOR EMERGENCY PLANNING

METHOD OF PREPARATION MAP EXPLANATIONTsunami Inundation LineTsunami Inundated Area

PURPOSE OF THIS MAP

MAP BASE

DISCLAIMER

State of Maryland - Ocean CityMarch 1, 2014

Scale 1:300002,250 0 2,250 4,5001,125

Feet

National Oceanic and Atmospheric Adminstration (NOAA)National Tsunami Hazarad Mitigation Plan (NTHMP)Center for Applied Coastal Research (CACR), University of Delaware

State of MarylandOcean City

Tsunami Inundation Map for Emergency PlanningOcean City

0.5 0 0.5 10.25Miles

0.5 0 0.5 10.25Kilometers

Tsu nam i sou rc e m od eling was perform ed by th e University of Rh od e Island (URI) fu nd ed by th e NationalTsu nam i Hazard Mitig ation Prog ram . First, a larg e earth qu ake in th e Pu erto Ric o Trenc h (PRT) in th e well-known Caribbean S u bd u c tion Zone (CS Z) was m od eled (Grilli and Grilli, 2013a). Th e oth er c oseism icsou rc e th at was stu d ied h ere is loc ated on Azores Gibraltar plate bou nd ary (Grilli and Grilli, 2013b). Bothof th ese sou rc es are g enerated ac c ord ing to th e stand ard Okad a m eth od . Cu m bre Vieja volc anic (CVV)collapse loc ated in Canary Island s is also c onsid ered to be anoth er sig nific ant tsu nam i sou rc e wh ic hth reatens th e loc ation of stu d y. A m u lti-flu id 3D Navier-S tokes solver (THETIS ) was u sed to c om pu te th evolc anic collapse tsu nam i sou rc e (Grilli and Grilli, 2013c ). Also, in th is projec t fou r d ifferent loc ations arec h osen on th e US east c oast sh elf break as th e m ost probable to experienc e a su bm arine m ass failu retsu nam i (Grilli et al., 2013). Th e land slid e m ovem ent is sim u lated with NHWAVE m od el.For bath ym etry d ata, th e integ rated bath ym etric -topog raph ic d ig ital elevation m od el (DEM) g eneratedby National Geoph ysical Data Center (NGDC) is u sed for h ig h -resolu tion inu nd ation m apping . For oc eanbasin tsu nam i propag ation, th e d epth valu es were obtained from th e 1 arc -m inu te ETOPO-1 d atabase,wh ile nearsh ore bath ym etry and topog raph y were obtained from NGDCs Coastal Relief Mod els, wh ic hare typic ally provid ed on a 1/3 arc -sec ond g rid .Tsu nam i nearsh ore propag ation and onsh ore inu nd ation were perform ed by University of Delawarefu nd ed by th e National Tsu nam i Hazard Mitig ation Prog ram . Here, we u sed FUNWAVE-TVD c od e toobtain th e tsu nam ni inu nd ation line. FUNWAVE-TVD (S h i et al., 2012) is a pu blic d om ain open-sou rc ecod e th at h as been u sed for m od eling tsu nam i propag ation insid e oc ean basin, nearsh ore tsu nam ipropag ation and inland inu nd ation problem s. We u sed th e record ed d ata on th e bou nd aries of Oc eanCity NGDC DEM to perform ou r nesting approac h to ac h ieve h ig h resolu tion resu lts c lose to th esh orelines. S im u lations with g rid sizes of rou g h ly 125.0 m eters (abou t 4 arc -sec ) are im plem ented on th isg rid to record proper d ata arou nd fou r DEMs with resolu tion of 1 arc -sec (extrac ted from 1/3 arc -secOc ean City DEM) insid e th e m ain reg ion. Using th is d ata, 1 and 1/3 arc -sec g rid s were u sed to g enerateth e inu nd ation line (Teh ranirad et al., 2014).Th e ac c u rac y of th e inu nd ation line sh own on th is m ap is constrained by several fac tors su c h as th eac c u rac y of th e m od els u sed h ere as well as th e bath ym etry d ata exac tness. It sh ou ld be noted th at th einu nd ation line d epic ts th e envelope of th e inu nd ation lines for all th e tsu nam i sou rc es stu d ied h ere andd oes not d em onstrate one partic u lar sou rc e.Referenc es:Grilli, A. R., and Grilli, S . T., 2013a, “Mod eling of tsu nam i g eneration, propag ation and reg ional im pac talong th e u pper US East Coast from th e Pu erto Ric o trenc h ”, Tec h nic al report, No. CACR-13-02, Centerfor Applied Coastal Researc h , University of Delaware.Grilli, A. R., and Grilli, S . T., 2013b, “Mod eling of tsu nam i g eneration, propag ation and reg ional im pac talong th e u pper US East Coast from th e Azores converg enc e zone”, Tec h nical report, No. CACR-13- 04,Center for Applied Coastal Researc h , University of Delaware.Grilli, A. R., and Grilli, S . T., 2013c , “Far-field tsu nam i im pac t on th e U.S . East Coast from and extrem eflank c ollapse of th e Cu m bre Vieja Volcano (Canary Island s)”, Tec h nical report, No. CACR-13-03, Centerfor Applied Coastal Researc h , University of Delaware.Grilli, S . T., OReilly, C. and Tajalli Bakh sh , T., 2013, “Mod eling of S MF tsu nam i g eneration and reg ionalim pac t along th e u pper US East Coast”, Researc h Report No. CACR-13-05, Center for Applied CoastalResearc h , University of Delaware.S h i, F., Kirby, J. T., Harris, J. C., Geim an, J. D., and Grilli, S . T., 2012 , “A h ig h -ord er ad aptive tim esteppingTVD solver for Bou ssinesq m od eling of breaking waves and c oastal inu nd ation”, Oc ean Mod elling , 43-44,36-51.Teh ranirad , B., Banih ash em i, S ., Kirby, J. T, Callah an, J. A, S h i, F., 2014, “Tsu nam i Inu nd ation Mapping forOc ean City, MD NGDC DEM”, Tec h nic al report, No. CACR-14-xx, Center for Applied Coastal Researc h ,

This tsunami inundation map was prepared to help coastal communitiesto identify their tsunami hazard. This map is not a legal document anddoes not meet disclosure requirements for real estate transactions norfor any other regulatory purpose. The inundation map has beenobtained through using the best available scientific information. Theinundation line represents the maximum tsunami runup extent utilizing anumber of extreme, yet scientifically realistic, tsunami sources. Thismap is supposed to portray the worst case scenario and does notprovide any further information about the return periods of the eventsstudied here.

Topographic base maps prepared by U.S. Geological Survey as part ofthe 7.5-minute Quadrangle Map Series (originally 1:24,000 scale).Tsunami inundation line boundaries may reflect updated digitaltopographic data that can differ significantly from contours shown on thebase map.

The National Tsunami Hazard Mitigation Program (NTHMP), theUniversity of Delaware (UD), and the University of Rhode Island (URI)make no representation or warranties regarding the accuracy of thisinundation map nor the data from which the map was derived. Neitherthe NTHMP nor UD shall be liable under any circumstances for anydirect, indirect, special, incidental or consequential damages withrespect to any claim by any user or any third party on account of orarising from the use of this map.

Tsunami sources modeled for the Ocean City coastline