Station Details
KWJN operational status:
2023.02.17
Telemetry was restored without any actions taken at the station.
2021.01.10
Telemetry to the station has been down since October 2021. IDA engineers are working with the station operator to resolve.
2020.02.04
The infrasound channels started excessively gapping on day 2020,035 due to suspected issues with the QEP.
2019.10.29
The station operator visited the station and replaced both Q330 digitizers with new digitizers shipped from UCSD. There is a data acquisition issue for the weather station channels.
2017.07.29
New IDA station KWJN installed on Kwajalein Atoll, Marshall Islands with two Q330HR data acquisition systems. Sensors installed include a Streckeisen STS-5A broadband sensor, a Nanometrics Trillium 120 Posthole broadband sensor, a Kinemetrics Episensor strong motion sensor, Hyperion Infrasound sensor, and ParoScientific and Setra barometers.
2017.08.08
Station KWAJ has been permanently closed and has been replaced by KWJN. Maintenance comments below this comment are from KWAJ, comments above this one are from KWJN.
2017.08.01
Telemetry to the station was intermittently down since day 2017,081. IDA engineers visited the station, confirmed the station is up, and restored telemetry.
2017.05.11
The station is down as of 2017,130-22:44 due to a power outage.
2017.04.28
The station is back online day 2017,118-17:31 after the station operator rebooted the firewall, and a hung data acquisition process was restarted.
2017.04.06
The station is down as of day 2017,084-16:48 due to reasons yet to be determined.
2016.10.11
Power was restored, and later the link to the station was restored after the station operator reset the network settings for the gateway computer. There is a data gap from day 2016,272-04:14 to 2016,274-20:36.
2016.09.30
The station is down due to a power outage. No data has been received since 2016,264 (Sept.20).
2015.12.14
The station is back online as of day 2015,345-20:47 after power was restored.
2015.12.09
The station is down as of day 2015,343-13:02 due to a power outage on the island.
2014.04.16
The station was down from day 2014,093-21:15 to 2014,104-20:14 due to a power and telemetry outage. Data acquisition resumed when power was restored.
2014.01.08
The station was down from day 2014,005-08:24 to 2014,008-01:11 due to a power outage. Data acquisition resumed when power was restored.
2013.10.24
IDA station KWAJ is back on-line as of day 2013,297-21:12 after the station operator replaced the power supply.
2013.09.05
IDA station KWAJ is down as of day 2013,248-14:55 due to a power failure. IDA engineers are preparing a Newmar power supply to ship to the station.
2013.06.18
The station is back online after the station operator replaced a blown fuse in the equipment rack.
2013.06.07
Telemetry to the station is down due to a power problem at the station. It is not yet known whether the station is still acquiring data.
2013.04.05
Telemetry was restored after the station operator visited the station and reset the ethernet connection.
2013.04.03
Telemetry to the station is down since day 2013,092-00:32 for reasons yet to be determined. The station operator has been requested to investigate.
2012.09.26
IDA station KWAJ is back on-line as of day 2012,269-23:29 after an IDA engineer visited the station and replaced the station computers, firewall, strong motion sensor, and installed a barometer.
2012.07.26
IDA station KWAJ has a long standing telemetry issue.
2012.02.22
Telemetry to IDA station KWAJ is down since day 2012,046-23:44. Communication with the station operator indicates the station is up, however, there is a suspected problem with the network configuration.
2011.06.09
An IDA engineer is currently on-site upgrading the station to a Quanterra Q330HR system. Sensors include STS-2 and Trillium seismometers, and a strong motion sensor.
2010.08.18
The station is back on-line as of day 2010,231-00:02 after the station operator cleared disk errors and rebooted the ISP.
2010.07.26
The station is down as of day 2010,203-00:12 due to problems with the ISP.
2010.03.30
The station operator replaced the station computer on day 2010,089 with one shipped from UCSD.
2009.11.19
The station is back up as of day 2009,322 after the station operator replaced the hard drive in the ISP.
2009.11.16
The station is down as of day 2009,315 due to problems with the station computer. A new station computer is being prepared to ship to the station.
2009.02.26
The station was down from about day 2009,049 to 2009,057 due to problems with the power inverter. Data acquisition was restored after the station operator cycled power to the inverter.
2008.10.29
The station was down from about day 2008,291 to 2008,303 due to communication problems between the DAS and the ISP. Data acquisition was restored after the station operator cycled power to the DAS.
2008.09.10
The East-West short period channels from the STS-2 seismometer are seismic as of about day 2008,247-2050.
2007.09.26
The station is back online as of about day 2007,269-20:25. The East-West and low gain short period channels from the STS-2 remain nonseismic.
2007.06.27
An IDA engineer visited the station and restored telemetry and communication between the ISP and the DAS. There is a faulty Amplifier Filter Unit at the station that will be replaced to bring the station back online.
2007.03.29
The GPS clock is back to a locked state as of about day 088-19:30.
2007.03.08
The GPS clock is in an unlocked state since day 067-12:16.
2006.08.19
The station is down as of about day 231-08:02 (Aug.19) due to communication problems between the DAS and the ISP.
2006.08.11
The station is back up after an IDA engineer visited the site and repaired the station uplink and power converter, and replaced circuit boards in the DAS. The STS-1 sensor is disconnected and is being shipped to UCSD for testing and repair.
2006.03.27
The station is down due to communication problems between the ISP and DAS.
2006.03.20
The vertical channels from the STS-1 seismometer are out as of 059-07:16 due to problems with the seismometer that are yet to be determined.
2005.01.27
The wdo channel data is normal again after an IDA engineer visited the station and replaced the microbarometer. During this visit the UPS batteries, and ISP were also replaced.
2004.09.20
There is a gap in data from Sept. 3 to Sept. 7 due to problems with the ISP. Data acquisition resumed when the station operator rebooted the ISP. There are still problems with the ISP display and a replacement is being prepared to send to the station. The wdo channel data is incorrect for reasons yet to be determined.
2004.08.19
The station’s GPS clock resumed normal status on 8/10/2004 (2004223).
2004.08.09
There is a problem with the station’s GPS clock as of 2004210-03:35.
2004.05.18
Telemetry data are resumed after station was rebooted on 2004139-14:24.
2003.08.13
Telemetry down since 213-12:31 (August 1,2003). Station remains operational and station operator requested to reboot the ISP.
2003.01.08
An IDA engineer visited the station to replace the EPROMs and install an STS1 east-west sensor.
2002.07.10
Telemetry problem has been resolved as of 2002:176 (June 25, 2002).
2002.04.22
There is currently no STS1-EW sensor at the station. There has been no telemetry for 10 days.