NOAA Tsunami Warning Centers (NTWC/PTWC) CAP/Atom alert feeds
NOAA Tsunami Warning Centers (NTWC/PTWC) CAP/Atom alert feeds
NOAA's National Tsunami Warning Center (NTWC) and Pacific Tsunami Warning Center (PTWC) publish live tsunami watch/warning/advisory alerts as CAP and Atom XML feeds. The tsunami.gov home page banner reads: "U.S. Tsunami Warning System".
Required Attribution:
Not stated as specific wording on the checked pages; the usual NWS disclaimer conditions apply (do not claim NWS material as your own, do not imply NOAA/NWS endorsement, and do not modify its content and present it as official government material); the disclaimer page also says you cannot present your own information in a way that makes it appear to be official government information.
Coverage
CAP XML alert feeds for the Pacific Tsunami Warning Center (PHEBCAP.xml) and National Tsunami Warning Center (PAAQCAP.xml), with Atom equivalents (PHEBAtom.xml / PAAQAtom.xml) at https://www.tsunami.gov/events/xml/. Update cadence: Not stated.
Verdict
Live tsunami watch/warning/advisory CAP and Atom XML alert feeds issued by NOAA's National Tsunami Warning Center and Pacific Tsunami Warning Center, no key. Recorded as Custom because the terms are the NWS public-domain statement rather than a licence id, mirroring nws-api/nhc-hurdat2/iowa-environmental-mesonet-api/aviationweather-data-api: "The information on National Weather Service (NWS) Web pages are in the public domain, unless specifically noted otherwise, and may be used without charge for any lawful purpose so long as you do not: 1) claim it is your own (e.g., by claiming copyright for NWS information -- see below), 2) use it in a manner that implies an endorsement or affiliation with NOAA/NWS, or 3) modify its content and then present it as official government material." Distinct from the live nws-api and nhc-hurdat2 entries (different provider pages and feed scope). Rate limits: Not stated. Signal Lab links only.
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