Originator: SeanPaul M. La Selle
Originator: Alex G. Snyder
Originator: Brandon M. Nasr
Originator: Bruce E. Jaffe
Originator: Andrew C. Ritchie
Originator: Nick Graehl
Originator: Jacqueline Bott
Observations of tsunami and runup heights in Santa Cruz Harbor and surrounding beaches from the 2022 Hunga Tonga-Hunga Ha'apai tsunami
Geospatial_Data_Presentation_Form: tabular digital data
Series_Name: data release
Pacific Coastal and Marine Science Center, Santa Cruz, California
Publisher: U.S. Geological Survey
The 14 January 2022 eruption of Tonga Hunga-Tonga Ha'apai volcano generated tsunamis that impacted the west coast of the United States on the morning of 15 January 2022. This data release presents runup heights and tsunami heights collected by the U.S. Geological Survey (USGS) and the California Geological Survey (CGS) during surveys at the Santa Cruz Harbor and beaches in Santa Cruz County, California, on January 19th and 20th, 2022 (USGS Field Activity 2022-607-FA). Evidence of tsunami inundation included high water marks on buildings and harbor infrastructure, wrack lines, and flow-direction indicators such as bent vegetation. Elevations surveyed at the maximum inland extent of tsunami inundation are classified as “runup heights.” High-water mark elevations are classified as “tsunami heights.” At Seabright, Beer Can, and Manresa beaches, the inferred tsunami inundation limit was identified as the highest wrack line on each beach. The wrack line coincided with a change in sand color, with the inundated side consisting of darker colored sand. Based on eyewitness and video observations of the tsunami in Santa Cruz Harbor, most of the surveyed tsunami and runup heights are the result of inundation from the highest wave around 08:50 PST (16:50 GMT). Flow-depth markers on buildings and infrastructure from a later wave were measured and reported as lower tsunami heights and are noted. The final point data are provided in a comma-separated text file and are projected in cartesian coordinates using the Universal Transverse Mercator (UTM), Zone 10 North, meters coordinate system.
Data were obtained to document perishable evidence of inundation in Santa Cruz County from the 2022 Tonga Hunga-Tonga Ha'apai tsunami. These data are intended for science researchers, students, policy makers, and the general public. These data can be used with geographic information systems or other software to assess the maximum tsunami elevations and inundation distance.
Currentness_Reference: ground condition
Maintenance_and_Update_Frequency: None planned
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: GPS measurement
Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords
Theme_Keyword: tsunami events
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: Coastal and Marine Hazards and Resources Program
Theme_Keyword: Pacific Coastal and Marine Science Center
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
Place_Keyword: Pacific Ocean
Place_Keyword: Monterey Bay
Place_Keyword: Santa Cruz County
Place_Keyword: Santa Cruz
USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. Please recognize and acknowledge the U.S. Geological Survey as the originator of the dataset and in products derived from these data.
U.S. Geological Survey, Pacific Coastal and Marine Science Center
Contact_Person: PCMSC Science Data Coordinator
Address_Type: mailing and physical
Address: 2885 Mission Street
City: Santa Cruz
Browse_Graphic_File_Description: Map and aerial imagery showing tsunami survey locations
Browse_Graphic_File_Description: Examples of post-tsunami evidence of inundation and flooding.
We would like to thank Santa Cruz Deputy Harbormaster, John Haynes, and Santa Cruz Harbormaster, Blake Anderson, for providing access to the harbor and for sharing their observations of tsunami impacts to the harbor.
Environment as of Metadata Creation: Microsoft Windows 11 Pro Version 22H2 (Build 22567.200); Microsoft Excel Version 2108 (Build 14326.20784); Trimble Business Center Version 4.10 (Build 4.10.6750.37011).