The fdsnws-dataselect service provides access to time series data for specified channels and time ranges.
This service is an implementation of the FDSN web service specification version 1.
NOTE: polling for real-time continuous data is not allowed. For continuous, near real-time data please use our streaming service.
Below is a full list of service parameters and their usage.
/query? (date-range-options) [channel-options] [quality-options] [misc-options] [format-options] [nodata=404]
date-range-options :: (start=<time>) (end=<time>) channel-options :: [net=<network>] [sta=<station>] [loc=<location>] [cha=<channel>] quality-options :: [quality=<D|R|Q|M|B>] misc-options :: [minimumlength=<seconds>] [longestonly=<true|false>] [repository=<repository_name>] [szsrecs=<true|false>] format-options :: [format=<mseed>]
Query parameters are joined by ampersands ”&”, without blank space (see the sample queries).
Alternately, instead of providing parameter-value pairs in the URL, a file containing a selection list can be POSTed to this service. This is the same method used with the fdsnws-station webservice. For additional details, including an example selection file, visit this page’s help section.
quality=<D|R|Q|M|B> minimumlength=<seconds> longestonly=<true|false> <Network> <Station> <Location> <Channel> <StartTime> <EndTime> ...
Quality, minimumlength, and longestonly are optional. Wildcards are acceptable for Network, Station, Location, and Channel. Click here for time format details.
Detailed Descriptions of each Query Parameter
|start[time]||2010-02-27T06:30:00||Specifies the desired start-time for miniSEED data||day/time|
|end[time]||2010-02-27T10:30:00||Specify the end-time for the miniSEED data||day/time|
|net[work]||IU||Select one or more network codes. Accepts wildcards and lists. Can be SEED codes or data center defined codes.||any||string|
|sta[tion]||ANMO||Select one or more SEED station codes. Accepts wildcards and lists.||any||string|
|loc[ation]||00||Select one or more SEED location identifier. Accepts wildcards and lists. Use
|cha[nnel]||BH1||Select one or more SEED channel codes. Accepts wildcards and lists.||any||string|
|quality||B||Select data based on miniSEED data quality indicator.
|minimumlength||0.0||Limit results to continuous data segments of a minimum length specified in seconds.||0.0||float|
|longestonly||false||Limit results to the longest continuous segment per channel.||false||boolean|
|repo[sitory]||realtime||Limit results to specified repositories. Acceptable values are primary (for the primary SEED archive) and realtime (for the realtime collection buffers).||primary||string|
|szsrecs||true||Skip over metadata records with zero samples, such as event detection data.||false||boolean|
|nodata||404||Specify which HTML Status code is returned when no data is found.1||204||204 or 404|
|format||mseed||Specify the format of the data returned||mseed||mseed|
1 By default, the service returns a HTTP response code 204, which means the request was successful, but no data (no content) was retrieved. However, because there was no “error”, no error message is generated and it may appear that the browser did nothing. To force an empty query response to display an error message, add
nodata=404 to the URL.
Retrieve the WADL associated with this service:
Year, Month, Day in Month — Time:
YYYY-MM-DDThh:mm:ss[.ssssss] ex. 1997-01-31T12:04:32.123
YYYY-MM-DD ex. 1997-01-31 a time of 00:00:00 is assumed
YYYY :: four-digit year MM :: two-digit month (01=January, etc.) DD :: two-digit day of month (01 through 31) T :: date-time separator hh :: two digits of hour (00 through 23) (AM/PM NOT allowed) mm :: two digits of minute (00 through 59) ss :: two digits of second (00 through 59) ssssss :: one to six digits representing decimal fractions of a second, down to microseconds
The question mark
? represents any single character (exactly one), while the asterisk
* represents zero or more characters.
Multiple items may also be retrieved using a comma separated list. Wildcards may be included in the list. For example, with channel codes:
Restricted Data Access
Requests sent to this URL are authenticated via
digest access authentication
in order to establish the caller's credentials. For anonymous access, the user
firstname.lastname@example.org and password
anonymous may be used. This
credential has identical data access permission as the regular submit path's: