In the wake of the devastating 2011 Tōhoku earthquake and tsunami, the Central Disaster Management Council of the Japanese Cabinet Office issued new guidance for assessing seismic hazards in Japan. Following the unexpectedly large magnitude of the earthquake and the size of the tsunami, the Cabinet Office advocated renewed investigation of earthquake and tsunami occurrence timescales exceeding the historical period, with a particular focus on defining the largest possible magnitudes. The new guidelines pay close attention to the Nankai Trough, the subduction zone where the Philippine Sea Plate dives beneath the Eurasian Plate. The Nankai Trough faces the densely populated and highly industrialised coastline of south central Japan. Here, we review geological evidence for past earthquakes and tsunamis along this subduction zone. This evidence comes from a wide variety of sources, including uplifted marine terraces, turbidites, liquefaction features, subsided marshes and tsunami deposits in coastal lakes and lowlands. More than 70 sites yield evidence, however the number of events recorded at each site varies depending on site-specific evidence creation and preservation thresholds. The longest record exceeds ten thousand years, however the majority are less than four thousand years long. Our compilation suggests that earthquakes in AD 684 and 1361 were similar predecessors of the AD 1707 earthquake, widely regarded as the largest event of the historical period. The more limited distribution of evidence for other historical earthquakes highlights the variability in rupture mode that characterises the Nankai Trough. The palaeoseismic catalogue is, however, limited due to issues over alternative hypotheses for proposed palaeoseismic evidence, poor chronological control and sampling approached insufficient to address the recurrence of the largest past earthquakes and tsunamis. We highlight recent advances and propose future directions for Nankai Trough palaeoseismology.
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DaRWIN (Data Research Warehouse Information Network) is an in-house solution developed by the Royal Belgian Institute of Natural Sciences (RBINS), as a Natural History collections management system for biological and geological samples in collections. In 2014, the Royal Museum for Central Africa (RMCA) adopted this system for its collections and started to take part in new developments. The DaRWIN database currently manages information on more than 600,000 records (about 4 million specimens) housed at the RBINS and more than 650,000 records (more than 1 million specimens) at the RMCA. DaRWIN is an open source system, consisting of a PostgreSQL database and a customizable web-interface based on the Symfony framework (https://symfony.com). DaRWIN is divided into 2 parts: one public section that gives a “read-only” access to digitised specimens, one section for registered users, with different levels of access rights (user, encoder, conservator and administrator), customizable for each collection and allowing update of specimens and collections, daily management of collections, and the potential for dealing with sensitive information. DaRWIN stores sample data and related information such as place and date of collection, missions and collectors, identifiers, technicians involved, taxonomy, identification information (type, stage, state, etc.), bibliography, related files, storage, etc. Other features that deal with day-to-day curation operations are available: loans, printing of labels for storage, statistics and reporting. DaRWIN features its own JSON (JavaScript Object Notation) webservice for specimens and scientific names and can export data in tab-delimited, Excel, PDF and GeoJSON formats. More recently, a procedure for importing batches of data has been developed, based on tab-delimited files, making integration of data from (old/historical) databases faster and more controlled. Additional improvements of$~$the$~$user interface and database model have been made. For example, parallel taxonomical hierarchies can be created, allowing users to work with temporary taxonomies, old scientific names (basionyms and synonyms) and document the history of type specimens. Finally, quality control and data cleaning on several tables have been implemented, e.g. mapping of locality names with vocabularies like Geonames, adding ISO 3166 two-letter country codes (https://www.iso.org/iso-3166-country-codes.html), cleaning duplicates from people/institutions and taxonomy catalogues. A tool for checking taxonomical names on GBIF (Global Biodiversity Information Facility), WoRMS (World Register of Marine Species) and DaRWIN itself, based on webservices and tab-delimited files, has been developed. Last year, RBINS, RMCA and Meise Botanic Garden (MBG) defined a new framework of collaboration in the NaturalHeritage project (http://www.naturalheritage.be), in order to foster interoperability among their collection data sources. This new framework presents itself as one common research portal$~$for$~$data on natural history collections (from DaRWIN and other existing collection databases) of the three partnered institutions and makes data compliant to a standard agreed by the partners. See Poster "NaturalHeritage: Bridging Belgian Natural History Collections" for more information. DaRWIN is accessible online (http://darwin.naturalsciences.be). A Github repository is also available (https://github.com/naturalsciences/natural\_heritage\_darwin).
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RBINS Staff Publications 2019
