A global tsunami data set in xlsx format, comprising the following file: tsunamis.xlsx Source ------ Global Tsunami Database, U.S. National Geospatial Data Center (NGDC), National Oceanic and Atmospheric Administration (NOAA) http://www.ngdc.noaa.gov/hazard/tsu.shtml Copyright Notice ---------------- The attribute values provided in tsunamis.xlsx, the coordinates provided in tsunamis.xlsx, and the specific attribute descriptions provided later in this file consist of U.S. Government material that is in the public domain and is not subject to copyright protection. Coordinate System ----------------- An approximate origin point for each event is provided in geodetic coordinates (latitude-longitude). No specific datum is indicated. (The coordinate precisions are typically 1 to 1/100th of a degree, which is too imprecise for the choice of datum to make a difference.) Data Set Construction --------------------- The data set is based on a query performed using the web interface to the Global Tsunami Database, resulting in an HTML table that could be imported into Excel. The query selected tsunami events from the years 1950-2006, inclusive, for which the maximum water height was at least one meter. Several events lacking latitude and longitude values were subsequently discarded, leaving a total of 162. The data were converted to xlsx format using Excel, MATLAB, and Mapping Toolbox. Most data fields were retained and used to populate shapefile attribute fields, but several sparsely-populated fields were discarded. Two additional attributes, 'Validity' and 'Cause' were added for convenience; they provide the string equivalents of numerical codes used in the Global Tsunami Database -- see the descriptions below for attributes 9-10 and 11-12. Attribute Descriptions ---------------------- Note: The Date and Time are given in Universal Coordinated Time (also known as Greenwich Mean Time). The local date may be one day different. Latitude Valid values: -90 to 90 ------------------------------------------------------------ Longitude Valid values: -180 to 180 ------------------------------------------------------------ Year Valid values: -2000 to Present ------------------------------------------------------------ Month Valid values: 1-12 ------------------------------------------------------------ Day Valid values: 1-31 (where months apply) ------------------------------------------------------------ Hour Valid values: 0-23 ------------------------------------------------------------ Minute Valid values: 0-59 ------------------------------------------------------------ Second Valid values: 0-59 ------------------------------------------------------------ ValidityCode Valid values: 0 to 4 Validity of the actual tsunami occurrence is indicated by a numerical rating of the reports of that event: 0 = erroneous entry 1 = very doubtful tsunami 2 = questionable tsunami 3 = probable tsunami 4 = definite tsunami ------------------------------------------------------------ Validity Validity of the actual tsunami occurrence expressed via the string corresponding to its Val_Code ------------------------------------------------------------ CauseCode Valid values: 0 to 11 Numerical code indicating the type of tsunami source: 0 = Unknown Cause 1 = Earthquake 2 = Questionable Earthquake 3 = Earthquake and Landslide 4 = Volcano and Earthquake 5 = Volcano, Earthquake, and Landslide 6 = Volcano 7 = Volcano and Landslide 8 = Landslide 9 = Meteorological 10 = Explosion 11 = Astronomical Tide ------------------------------------------------------------ Cause The source of the tsunami expressed via the string corresponding to its Cause_Code ------------------------------------------------------------ EarthquakeMagnitude - Primary Earthquake Magnitude Valid values: 0.0 to 9.9 The value may be taken from one of several different earthquake magnitude scales. If more than one magnitude is available, the primary magnitude is chosen from the available magnitudes in order of decreasing preference as follows: Mw Magnitude Ms Magnitude Mb Magnitude Ml Magnitude Mfa Magnitude Unknown Magnitude The Global Tsunami Database does not indicate which magnitude scale was chosen for any specific event. ------------------------------------------------------------ Country The country where the tsunami source occurred (for example, Japan or Russia) ------------------------------------------------------------ Location - Source Location Name The Country, State, Province or Island where the tsunami source occurred (for example, Japan or Honshu) This is only an approximate geographic location. If there are different spellings of a city name the additional names are in parentheses. ------------------------------------------------------------ MaxHeight - Maximum Water Height Valid values: .01 to 525 The maximum water height above sea level in meters for this event. It is the height the tsunami reached above a reference level such as mean sea level but it is not always clear which reference level was used. Three types of observations are considered: * Tide Gauge - half of the maximum (peak-to-peak) height (minus the normal tide) of a tsunami wave recorded at the coast by a tide gauge. * Deep Ocean Gauge - half of the maximum (peak-to-peak) height (minus the normal tide) of a tsunami wave recorded in the open ocean by a seafloor bottom pressure recording system. * Runup Height - the maximum elevation on land reached by the wave at the maximum inundation. ------------------------------------------------------------ IidaMagnitude - Tsunami Magnitude (Iida) Valid values: -5 to 10 Tsunami magnitude (M) is defined by Iida and others (1967) as M = log2(h), where "h" is the maximum runup height of the wave. ------------------------------------------------------------ Intensity - Tsunami Intensity Valid values: -5 to 10 Tsunami intensity is defined by Soloviev and Go (1974) as I = log2(2^(1/2) * h), where "h" is the maximum runup height of the wave. ------------------------------------------------------------ NumDeaths - Number of Deaths from the Tsunami Whenever possible, numbers of deaths from the tsunami are listed. ------------------------------------------------------------ DescDeaths - Description of Number of Deaths from the Tsunami Valid values: 0 to 3 When a description was found in the historical literature instead of an actual number of deaths, it was converted to one of the codes listed below. If the actual number of deaths (Num_Deaths) was listed, a description code was also added for search purposes. 0 = None 1 = Few (~1 to 50 deaths) 2 = Some (~51 to 100 deaths) 3 = Many (~101 to 1000 deaths) 4 = Very many (over 1000 deaths) ---------------------------------- Copyright 2016 The MathWorks, Inc.