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rray
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USA
rray Data Overview
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Reference Network Overview
Flexible Array Overview
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USA
rray Stations
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Data Access Examples
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USA
rray Data Overview
The
USA
rray component of the EarthScope experiment was a continental-scale seismic observatory designed to provide a foundation for integrated studies of continental lithosphere and deep Earth structure over a wide range of scales.
USA
rray will provide new insight and new data to address fundamental questions in earthquake physics, volcanic processes, core-mantle interactions, active deformation and tectonics, continental structure and evolution, geodynamics, and crustal fluids (magmatic, hydrothermal, and meteoric).
Learn more at the
USA
rray website »
The EarthScope
DMC
is the final archive and distribution point for all raw
USA
rray data from each sub-component: Transportable Array, Reference Network (Backbone/Permanent Array), Flexible Array and Magnetotelluric Array.
The
DMC
’s
Virtual Network
concept can be used to select various components of
USA
rray data. The following table illustrates the scope of the
USA
rray virtual networks:
Virtual Network code
Description
_US-TA
USA
rray Transportable Array stations
_US-
REF
USA
rray Reference Network (including Backbone/Permanent Array) stations
_US-FA
USA
rray Flexible Array stations
_US-MT
USA
rray Magnetotelluric stations
_US-
ALL
All
USA
rray stations
USA
rray Transportable Array
The Transportable Array is a set of 400 broadband stations that will, over the 10 year course of the project, traverse the conterminous United States. The
DMC
receives 40 and 1 samples/second seismic data streams from each site in addition to related state-of-health data in real-time. Since mid-2010, atmospheric sensors have been installed at the TA stations. Information about these sensors is available at
usarray.org Atmospheric
Station lists
List
Description
Operating Stations List
List of Operating TA stations in
HTML
format
Operating Stations:
XML
Text
MS-Excel
List of Operating TA stations in
XML
, Text (tab separated) and MS-Excel
All Stations List
List of all (past and present) TA stations in
HTML
format
All Stations:
XML
Text
MS-Excel
List of all TA stations in
XML
, Text (tab separated values) and MS-Excel
Station maps
Map Data
Description
Operating Stations Google Map
Operating TA stations as a web-viewable Google Map
Operating Stations
KML
Operating TA stations as a
KML
NetworkLink (e.g. for
Google Earth
Operating Stations Map
GIF
Operating TA Network stations as a
GIF
image file, conterminous US only
Operating Alaska Stations Map
GIF
Operating TA Network stations as a
GIF
image file, Alaska region only
All Stations Google Map
All TA stations (past and present) as a web-viewable Google Map
All Stations
KML
All TA stations as a
KML
NetworkLink (e.g. for
Google Earth
All Stations Map
GIF
All TA stations as a
GIF
image file, conterminous US only
Station reports
Report
Description
Station Digests
Summary of station information, created after station closure
Landowner Reports
Summary of station information, intended for the station hosts
USA
rray Reference Network (including Backbone/Permanent Array)
The Reference Network is composed of permanent stations at a roughly 300 km spacing across the United States and includes the 39 EarthScope-funded Permanent Array stations. The
DMC
receives 40 and 1 samples/second seismic data streams from most sites.
Station lists
List
Description
Station List
List of Reference Network stations in
HTML
format
Stations:
XML
Text
MS-Excel
Reference Network stations in
XML
, Text (tab separated values) and MS-Excel
Station maps
Map Data
Description
Stations Google Map
Permanent Array stations as web-viewable Google Map
Station
KML
Reference Network stations as a
KML
file (e.g. for
Google Earth
Stations Map
GIF
Reference Network stations as a
GIF
image file, conterminous US only
Alaska Stations Map
GIF
Reference Network stations as a
GIF
image file, Alaska region only
USA
rray Flexible Array
The Flexible Array is a set of broadband and active-source oriented instruments deployed on a temporary basis according to individual proposal (the
PASSCAL
model). Data rates and availability from Flexible Array deployments depend on the individual proposals.
Station lists:
List
Description
Operating Stations List
List of Operating FA stations in
HTML
format
Operating Stations:
XML
Text
MS-Excel
List of Operating FA stations in
XML
, Text (tab separated) and MS-Excel
All Stations List
List of all (past and present) FA stations in
HTML
format
All Stations:
XML
Text
MS-Excel
List of all FA stations in
XML
, Text (tab separated values) and MS-Excel
Station maps
Map Data
Description
Operating Stations Google Map
Operating FA stations as a web-viewable Google Map
Operating Stations
KML
Operating FA stations as a
KML
file (e.g. for
Google Earth
Operating Station Map
GIF
Operating FA Network stations as a
GIF
image file, conterminous US only
All Stations Google Map
All FA stations (past and present) as web-viewable Google Map
All Stations
KML
All FA stations as a
KML
NetworkLink (e.g. for
Google Earth
All Stations Map
GIF
All FA stations as a
GIF
image file, conterminous US only
USA
rray Magnetotelluric
The magnetotelluric (MT) component of
USA
rray consists of 7 permanent MT stations and a mobile array of 20 MT stations that will each be deployed for a period of about one month in regions of identified interest with a spacing of approximately 70 km.
Station lists
List
Description
Operating Stations List
List of Operating Magnetotelluric stations in
HTML
format
Operating Stations:
XML
Text
MS-Excel
List of Operating Magnetotelluric stations in
XML
, Text (tab separated) and MS-Excel
All Stations List
List of all (past, present and future) Magnetotelluric stations in
HTML
format
All Stations:
XML
Text
MS-Excel
List of all Magnetotelluric stations in
XML
, Text (tab separated values) and MS-Excel
Station maps
Map Data
Description
Operating Stations Google Map
Operating MT stations as web-viewable Google Map
Operating Stations
KML
Operating MT stations as a
KML
file (e.g. for
Google Earth
Operating Stations Map
GIF
Operating MT Network stations as a
GIF
image file, conterminous US only
All Stations Google Map
All MT stations (past and present) as web-viewable Google Map
All Stations
KML
Magnetotelluric stations as a
KML
NetworkLink (e.g. for
Google Earth
All Stations Map
GIF
All MT stations as a
GIF
image file, conterminous US only
All
USA
rray Stations
Station lists
List
Description
Operating Stations List
List of Operating
USA
rray stations in
HTML
format
Operating Stations:
XML
Text
MS-Excel
List of Operating
USA
rray stations in
XML
, Text (tab separated) and MS-Excel
All Stations List
List of all (past, present and future)
USA
rray stations in
HTML
format
All Stations:
XML
Text
MS-Excel
List of all
USA
rray stations in
XML
, Text (tab separated values) and MS-Excel
Station maps
Map Data
Description
Operating Stations Google Map
Operating
USA
rray stations as a web-viewable Google Map
Operating Stations
KML
Operating
USA
rray stations as a
KML
NetworkLink (e.g. for
Google Earth
Operating Stations Map
Operating
USA
rray stations as a
GIF
, conterminous US only.
Includes legacy TA stations(former TA stations still operating, often under a different network name)
Operating Alaska Stations Map
Operating
USA
rray Alaska stations as a
GIF
image file, Alaska region only
All Stations Google Map
All
USA
rray stations (past and present) as a web-viewable Google Map
All Stations
KML
All
USA
rray stations as a
KML
NetworkLink (e.g. for
Google Earth
USA
rray Quality Control at the
DMC
The
DMC
performs both automated and manual quality control on
USA
rray data. A small team of analysts review raw
USA
rray data regularly in addition to performing higher level quality control measurements. More details are available on the
USA
rray Quality Control Overview
page.
To Request
USA
rray Data from the
DMC
All
USA
rray data at the
DMC
is managed within the existing
DMC
infrastructure along with all the other, non-
USA
rray data at the
DMC
. This means that
USA
rray data is available via all the
DMC
’s traditional request mechanisms.
Before requesting data for the first time, we recommend that you learn about requesting and using EarthScope data in general. A good place to start is on the
EarthScope
DMC
Data page
Real-time data:
EarthScope distributes near-real time miniSEED data directly from our real-time collection system (
BUD
).
Click here for details about getting data from our real-time systems
. The recommended method for receiving real-time data feeds is with the
DMC
’s
SeedLink
service.
Transportable Array and Reference Network:
Data from both the Transportable Array and Reference Network are delivered to the
DMC
in near-real time in
SEED
format. It is available via all the
DMC
’s traditional request mechanisms
including near-real time. Approximately 7 days after arriving at the
DMC
the data are copied to the primary archive making them available to all request mechanisms. The data remain in, and are available via, the real-time collection system (
BUD
) for two months.
Transportable Array
SEED
data qualities (in order of increasing preference)
SEED
Quality
Description
Data delivered to the EarthScope
DMC
via real-time telemetry
Gap-fill data delivered after real-time data, usually delivered within 3 months of real time.
TA final station data sets delivered after station removal, these data are primarily onsite (Baler) data merged with real-time telemetered data
Transportable Array data do not contain routine timing or other corrections, the differences in the data qualities is primarily completeness and, in the case of TA Final data sets, richness in terms of included data quality bits in the Mini-
SEED
headers.
Most
DMC
request mechanisms will default to returning the highest quality data, or a mix thereof, available for the request. Some request mechanisms also allow selection of specific qualities.
Transportable Array Channel Descriptions
The following is a list of all channels collected for the Transportable Array. Not all of these channels are available in real-time, and not all channels are available for every station.
sps
— samples per second
Channel
Description
Sample Rate (sps)
BHZ
Broadband Seismometer Vertical ground velocity, Q330 Chan1
40
BHN
Broadband Seismometer North ground velocity, Q330 Chan2
40
BHE
Broadband Seismometer East ground velocity, Q330 Chan3
40
LHZ
Broadband Seismometer Vertical ground velocity, Q330 Chan1
LHN
Broadband Seismometer North ground velocity, Q330 Chan2
LHE
Broadband Seismometer East ground velocity, Q330 Chan3
VHZ
from
LHZ
via
VLP
389, gain=1
0.1
VHN
from
LHN
via
VLP
389, gain=1
0.1
VHE
from
LHE
via
VLP
389, gain=1
0.1
UHZ
from
VHZ
via
ULP
379, gain=1
0.01
UHN
from
VHN
via
ULP
379, gain=1
0.01
UHE
from
VHE
via
ULP
379, gain=1
0.01
VEP
input voltage, 1count=150mV
0.1
VEC
system current, 1 count=1mA
0.1
VEA
GPS
antenna current, 1 count=1mA
0.1
VKI
330 internal temp, 1 count=1 degree C
0.1
VCO
330 voltage controlled oscillator
0.1
VM1
Boom position ch1, 1 count=0.1V
0.1
VM2
Boom position ch2, 1 count=0.1V
0.1
VM3
Boom position ch3, 1 count=0.1V
0.1
LCQ
clock quality, in percent. See definition in Q330
MSEED
description
LCE
lock phase error from
UTC
in usec
VFP
percent of free packets in the DP4 queue
0.1
LTW
a byte of status bit information related to onsite conditions
VCE
from
LCE
via
VLP
389
0.1
VCQ
from
LCQ
via
VLP
389
0.1
VTW
from
LTW
via
VLP
389
0.1
ACE
Administrative Clock Error, a blog of clock messages
none
LOG
a text log of datalogger and baler messages
none
OCF
a daily binary snapshot of the q330 configuration
none
EP-
LDM
absolute barometric pressure in hPa,
MEMS
sensor
QEP
onboard, Q330
EP-
LKM
internal temperature inside
VIE
enclosure in degrees C,
QEP
onboard, Q330
EP-
LIM
internal humidity inside
VIE
enclosure in percent,
QEP
onboard, Q330
EP-
LEP
voltage supply, in volts,
QEP
onboard, Q330
EP-
LCE
clock phase error relative to
UTC
, in usec,
QEP
onboard, Q330
EP-
LCO
oscillator control value,
QEP
onboard, Q330
EP-
BDO
absolute barometric pressure Setra 278 w/o 800 hPa offset,
QEP
ADC
3 Chan1 Q330
40
EP-
LDO
absolute barometric pressure Setra 278 w/o 800 hPa offset,
QEP
ADC
3 Chan1 Q330
EP-
BDF
infrasound microphone, relative barometric pressure,NCPA
IFS
-4532,
QEP
ADC
3 Chan2, Q330
40
EP-
LDF
infrasound microphone, relative barometric pressure,NCPA
IFS
-4532,
QEP
ADC
3 Chan2, Q330
Additional channels for a Strong Motion sensor (Kinemetrics
EST
Episensor, 2g, 10V/g)
Channel
Description
Sample Rate (sps)
HNZ
Accelerometer, vertical ground acceleration, Chan 4 Q330
100
HNN
Accelerometer, north ground acceleration, Chan 5 Q330
100
HNE
Accelerometer, east ground acceleration, Chan 6 Q330
100
LNZ
Accelerometer, vertical ground acceleration, Chan 4 Q330
LNN
Accelerometer, north ground acceleration, Chan 5 Q330
LNE
Accelerometer, east ground acceleration, Chan 6 Q330
Additional channels for a Vaisala
WXT
-520 weather station
Channel
Description
Sample Rate (sps)
EP-
LWD
Wind Direction in degrees, Vaisala
WXT
520,
QEP
Q330
EP-
LWS
Wind Speed in 0.1 m/sec, Vaisala
WXT
520,
QEP
Q330
EP-
LDV
Outdoor Pressure in 0.1 hPA, Vaisala
WXT
520,
QEP
Q330
EP-
LKO
Outdoor Temperature in 0.1 deg C, Vaisala
WXT
520,
QEP
Q330
EP-
LIO
Outdoor Humidity in 0.1 percent, Vaisala
WXT
520,
QEP
Q330
EP-
LRO
Rain Intensity in 0.1 mm/hour, Vaisala
WXT
520,
QEP
Q330
EP-
LRH
Hail Intensity in hits/cm**2*hour, Vaisala
WXT
520,
QEP
Q330
EP-
LKH
Heater Temperature in 0.1 deg C, Vaisala
WXT
520,
QEP
Q330
EP-
LEH
Heater Voltage in 0.1 V, Vaisala
WXT
520,
QEP
Q330
EP-
LEW
Supply Voltage in 0.1 V, Vaisala
WXT
520,
QEP
Q330
EP-
LER
Reference Voltage in 0.001 V, Vaisala
WXT
520,
QEP
Q330
Flexible Array
Flexible Array experiments are usually conducted like traditional
IRIS
PASSCAL
experiments in that data is retrieved from the field at specific intervals, sent to the
PASSCAL
Instrument Center and finally shipped to the
DMC
. These data are available via all “the
DMC
’s traditional request mechanisms”/ds/nodes/dmc/tools/ shortly after being received at the
DMC
with the access method dependent on the data type (either the
SEED
archive or Assembled data sets).
In some cases Flexible Array experiment data are telemetered in near-real time to the
DMC
in which case the data is managed similarly to Transportable Array, Reference Network or other real-time data feeds.
USA
rray Data Access Examples
This section is not intended to be an exhaustive tutorial for
DMC
data access, that function is served by the
Tools page
. Instead the purpose of these examples are to provide a brief illustration of and kickstart for data access.
Real-time data feeds
The preferred method to get continuous, real-time data feeds from
USA
rray stations is to use the EarthScope
DMC
’s
SeedLink service
. Note that most but not all
USA
rray stations are delivered to the
DMC
in real-time.
SeedLink client software exists for
BRTT
’s Antelope
Earthworm
SeisComP
and a command line client, slarchive, that will write Mini-
SEED
data directly into the directories and files of your chosing. In the case of Antelope and Earthworm, client programs are included with the recent releases, otherwise source code for client software can be found on the
SeedLink service
overview page.
BREQ
_FAST
breq_fast
is an email-based request mechanism. A user sends a formatted request to breq_fast@iris.washington.edu, after which the user is notified by email when the request is ready to download from the
DMC
. The breqfast format is described
here
As a simple example, requesting a 40-minute window of data from the
LHZ
channel of every TA network station could be done by sending the following in the body of an email to breq_fast@iris.washington.edu:
.NAME Joe Researcher
.EMAIL joe@university.edu
.MEDIA FTP
.LABEL TA-TongaEvent
.END
* TA 2006 05 03 15 30 00.0 2006 05 03 16 10 00.0 1 LHZ
Note that this request only includes the
TA
network stations (the stations installed by EarthScope specifically for the Transportable Array). To request data from all Transportable Array stations including the shared and cooperative stations replace the
TA
network code with the
_US-TA
virtual network code.
Web Services
EarthScope web services
provides direct access to data and metadata archived at the
DMC
Sample queries:
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by the CoreTrustSeal Standards and Certification Board
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Connect
EarthScope Consortium operates the
NSF Geodetic Facility for the Advancement of Geoscience (GAGE)
and NSF Seismological Facility for the Advancement of Geoscience (SAGE).
Any opinions, findings and conclusions, or recommendations expressed
in this material do not necessarily reflect the views of the
U.S. National Science Foundation.
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