# obspy.clients.fdsn - FDSN web service client for ObsPy The obspy.clients.fdsn package contains a client to access web servers that implement the [FDSN web service definitions](https://www.fdsn.org/webservices/). **copyright:** The ObsPy Development Team (devs@obspy.org) **license:** GNU Lesser General Public License, Version 3 (https://www.gnu.org/copyleft/lesser.html) ## Contents - [Basic FDSN Client Usage](#basic-fdsn-client-usage) - [Basic Routing Clients Usage](#basic-routing-clients-usage) ## Basic FDSN Client Usage The first step is always to initialize a client object. ```python >>> from obspy.clients.fdsn import Client >>> client = Client("IRIS") ``` A client object can be initialized either with the base URL of any FDSN web service or with a shortcut name which will be mapped to a FDSN URL. All the example make use of the FDSN web service at IRIS. For a list of other available web service providers, see the `__init__()` method. The currently available providers are: ```python >>> from obspy.clients.fdsn.header import URL_MAPPINGS >>> for key in sorted(URL_MAPPINGS.keys()): ... print("{0:<11} {1}".format(key, URL_MAPPINGS[key])) AUSPASS http://auspass.edu.au BGR http://eida.bgr.de EIDA http://eida-federator.ethz.ch EMSC http://www.seismicportal.eu ETH http://eida.ethz.ch GEOFON http://geofon.gfz-potsdam.de GEONET http://service.geonet.org.nz GFZ http://geofon.gfz-potsdam.de ICGC http://ws.icgc.cat IESDMC http://batsws.earth.sinica.edu.tw INGV http://webservices.ingv.it IPGP http://ws.ipgp.fr IRIS http://service.iris.edu IRISPH5 http://service.iris.edu ISC http://www.isc.ac.uk KNMI http://rdsa.knmi.nl KOERI http://eida.koeri.boun.edu.tr LMU https://erde.geophysik.uni-muenchen.de NCEDC http://service.ncedc.org NIEP http://eida-sc3.infp.ro NOA http://eida.gein.noa.gr ODC http://www.orfeus-eu.org ORFEUS http://www.orfeus-eu.org RASPISHAKE https://data.raspberryshake.org RESIF http://ws.resif.fr RESIFPH5 http://ph5ws.resif.fr SCEDC http://service.scedc.caltech.edu TEXNET http://rtserve.beg.utexas.edu UIB-NORSAR http://eida.geo.uib.no USGS http://earthquake.usgs.gov USP http://sismo.iag.usp.br ``` 1. `get_waveforms()`: The following example illustrates how to request and plot 60 minutes of the `"LHZ"` channel of station Albuquerque, New Mexico (`"ANMO"`) of the Global Seismograph Network (`"IU"`) for an seismic event around 2010-02-27 06:45 (UTC). Results are returned as a `Stream` object. See the `get_waveforms_bulk()` method for information on how to send multiple requests simultaneously to avoid unnecessary network overhead. ```python >>> from obspy import UTCDateTime >>> t = UTCDateTime("2010-02-27T06:45:00.000") >>> st = client.get_waveforms("IU", "ANMO", "00", "LHZ", t, t + 60 * 60) >>> st.plot() ``` 2. `get_events()`: Retrieves event data from the server. Results are returned as a `Catalog` object. ```python >>> starttime = UTCDateTime("2002-01-01") >>> endtime = UTCDateTime("2002-01-02") >>> cat = client.get_events(starttime=starttime, endtime=endtime, ... minmagnitude=6, catalog="ISC") >>> print(cat) 2 Event(s) in Catalog: 2002-01-01T11:29:22.720000Z | +6.282, +125.749 | 6.3 MW 2002-01-01T07:28:57.480000Z | +36.991, +72.336 | 6.3 Mb >>> cat.plot() ``` 3. `get_stations()`: Retrieves station data from the server. Results are returned as an `Inventory` object. ```python >>> inventory = client.get_stations(network="IU", station="A*", ... starttime=starttime, ... endtime=endtime) >>> print(inventory) Inventory created at ... Created by: IRIS WEB SERVICE: fdsnws-station | version: ... ... Sending institution: IRIS-DMC (IRIS-DMC) Contains: Networks (1): IU Stations (3): IU.ADK (Adak, Aleutian Islands, Alaska) IU.AFI (Afiamalu, Samoa) IU.ANMO (Albuquerque, New Mexico, USA) Channels (0): >>> inventory.plot() ``` ## Basic Routing Clients Usage Routers are web services that can be queried for which data centers offer certain pieces of data. That information can then be used to get the actual data from various data center across the globe. All current routing services only support the `dataselect` and the `station` FDSNWS services. ObsPy has support for two routing services: i. The [IRIS Federator](https://service.iris.edu/irisws/fedcatalog/1/). ii. The [EIDAWS Routing Service](http://www.orfeus-eu.org/data/eida/webservices/routing/). To use them, call the `RoutingClient()` function: ```python >>> from obspy.clients.fdsn import RoutingClient ``` Get an instance of a routing client using the IRIS Federator: ```python >>> client = RoutingClient("iris-federator") >>> print(type(client)) ``` Or get an instance of a routing client using the EIDAWS routing web service: ```python >>> client = RoutingClient("eida-routing") >>> print(type(client)) ``` They can be used like the normal FDSNWS clients, meaning the `get_(waveforms|stations)(_bulk)()` functions should work as expected. To be able to do geographic waveform queries with the EIDA service, ObsPy will internally perform a station query before downloading the waveforms. This results in a similar usage between the EIDA and IRIS routing services from a user's perspective. The following snippet will call the IRIS federator to figure out who has waveform data for that particular query and subsequently call the individual data centers to actually get the data. This happens fully automatically - please note that the clients also supports non-standard waveform query parameters like geographical constraints. ```python >>> from obspy import UTCDateTime >>> client = RoutingClient("iris-federator") >>> st = client.get_waveforms( ... channel="LHZ", starttime=UTCDateTime(2017, 1, 1), ... endtime=UTCDateTime(2017, 1, 1, 0, 5), latitude=10, ... longitude=10, maxradius=25) >>> print(st) 2 Trace(s) in Stream: II.MBAR.00.LHZ | 2017-01-01T00:00:00Z - ... | 1.0 Hz, 300 samples II.MBAR.10.LHZ | 2017-01-01T00:00:00Z - ... | 1.0 Hz, 300 samples ``` The same works for stations: ```python >>> client = RoutingClient("iris-federator") >>> inv = client.get_stations( ... channel="LHZ", starttime=UTCDateTime(2017, 1, 1), ... endtime=UTCDateTime(2017, 1, 1, 0, 5), latitude=10, ... level="channel", longitude=10, maxradius=25) >>> print(inv) Inventory created at 2017-10-09T14:26:28.466161Z Created by: ObsPy 1.0.3.post0+1706.gef068de324.dirty https://www.obspy.org Sending institution: IRIS-DMC,ObsPy ..., SeisComP3 (GFZ,IPGP, IRIS-DMC) Contains: Networks (6): AF, G, II, IU, TT, YY Stations (10): AF.EKNA (Ekona, Cameroon) AF.KIG (Kigali, Rwanda) G.TAM (Tamanrasset, Algeria) II.MBAR (Mbarara, Uganda) IU.KOWA (Kowa, Mali) TT.TATN (Station Tataouine, Tunisia) YY.GIDA (Health Center, Gidami, Ethiopia) YY.GUBA (Police Station, Guba, Ethiopia) YY.MEND (High School, Mendi, Ethiopia) YY.SHER (Police Station, Sherkole, Ethiopia) Channels (11): AF.EKNA..LHZ, AF.KIG..LHZ, G.TAM.00.LHZ, II.MBAR.00.LHZ, II.MBAR.10.LHZ, IU.KOWA.00.LHZ, TT.TATN.00.LHZ, YY.GIDA..LHZ, YY.GUBA..LHZ, YY.MEND..LHZ, YY.SHER..LHZ ``` Please see the documentation for each method for further information and examples. ## Classes & Functions | Class | Description | |-------|-------------| | `client.Client` | FDSN Web service request client. | | `routing.routing_client.RoutingClient` | Helper function to get the correct routing instance. | | `mass_downloader.download_helpers._SlotsEqualityComparisionObject` | Helper object with an equality comparision method simply comparing all slotted attributes. | ## Modules | Module | Description | |--------|-------------| | `client` | FDSN Web service client for ObsPy. | | `routing` | obspy.clients.fdsn.routing - Routing services for FDSN web services | | `routing.routing_client` | Base class for all FDSN routers. | | `routing.routing_client.BaseRoutingClient` | | | `routing.eidaws_routing_client` | Routing client for the EIDAWS routing service. | | `routing.eidaws_routing_client.EIDAWSRoutingClient` | Routing client for the EIDAWS routing service. | | `routing.federator_routing_client` | Routing client for the IRIS federator routing service. | | `routing.federator_routing_client.FederatorRoutingClient` | | | `mass_downloader` | Mass Downloader for FDSN Compliant Web Services | | `mass_downloader.domain` | Domain definitions for the download helpers. | | `mass_downloader.mass_downloader.MassDownloader` | Class facilitating data acquisition across all FDSN web service implementations. | | `mass_downloader.restrictions` | Non-geographical restrictions and constraints for the mass downloader. | | `mass_downloader.download_helpers` | Helpers for the mass downloader. |