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Tiltmeter data from Kīlauea summit stations UWE and SDH from January 1 to December 31, 2020 Tiltmeter data from borehole tilt stations UWE and SDH from January 1 to December 31, 2020, spanning a Kīlauea summit intrusion and summit eruption that began on December 20, 2020. These data were collected in 2020 by Andria P Ellis and Ingrid A Johanson of the USGS Hawaiian Volcano Observatory. The authors thank Sarah Conway for conducting the nearly monthly clock resets for these tiltmeters in 2020. Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Geophysics, Remote Sensing, USGS Science Data Catalog (SDC), Volcanology, field inventory and monitoring, All tags... geodesy, tiltmeter measurement, volcanic activity, Fewer tags Colorimeter data for the summit water lake at Kīlauea Volcano, Island of Hawaiʻi, 2020 In 2018, a large effusive eruption on the lower flank of Kīlauea Volcano was associated with collapse and subsidence of the summit caldera floor (Neal and others, 2019). The bottom of Halemaʻumaʻu, a crater nested within the summit caldera, subsided by more than 500 m. In July 2019, water was observed ponding on the deepest part of the Halemaʻumaʻu crater floor and the water rose and enlarged in area steadily over the next 16 months (Ingebritsen and others, 2020; Nadeau and others, 2020; Patrick and others, 2021). During the course of the rise, the lake surface appearance was highly dynamic and segmented, showing regions of variable color that changed from day to day (Nadeau and others, 2020). In June 2020 staff... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Halemaʻumaʻu, Hydrology, Kīlauea Crater, Remote Sensing, USGS Science Data Catalog (SDC), All tags... Volcanology, colorimeter, crater lake, geoscientificInformation, hydrology, volcanic activity, volcano monitoring, volcanology, Fewer tags Campaign GPS measurements on the Island of Hawaiʻi collected by the Hawaiian Volcano Observatory in 2021 This release includes data collected during campaign GPS surveys at Kīlauea and Mauna Loa Volcanoes on the Island of Hawaiʻi in 2021. It includes data from a total of 63 sites occupied from January 1 to December 31, 2021. For each site, we include its measured raw data in daily files, Receiver INdependent EXchange (RINEX) files for each day, field log sheet(s), and associated metadata information. We also include a few days of data at the end of 2020 at 3 longer-term campaign sites at Kīlauea’s summit. These sites (109Y, NDDB, OVRL) were deployed in late December 2020 in response to the December 20, 2020, Kīlauea summit eruption. The authors thank USGS Hawaiian Volcano Observatory staff, volunteers, and collaborators... Categories: Data; Tags: Field inventory and monitoring, Geodesy, Geophysics, Geophysics, Hawaiʻi Volcanoes National Park, All tags... Island of Hawaiʻi, Kīlauea Volcano, Mauna Loa Volcano, USGS Science Data Catalog (SDC), Volcanic Activity, Volcanology, biota, Fewer tags