Tech Staff Meeting Notes February 6, 2013

The top priority is always repair of down stations.
NM problem stations
ET problem stations

Duty Table updated May 2012


News & Highlights

USGS dignitaries will be visiting on 2/7.

Discussion of seisnet budget and the sequestor

Kudos from Meremonte and Leith on Bayou Corne

Middle TN Station (aka CLTN)

Online. Need an earthen berm around the top of the vault.

Need a PFLR alarm in 218/3904. Currently only get a PFLR when UPS dies. Need to know when Line goes down and when gernator transfers or not.


Short Period & Broadbands

Routine Maintenance: Top Priorities for the new year are these 2012 leftovers.

NMAD: 1 ISIS and 0 bb

LNXT: Done

MKTA: 6 ISIS and 1 bb

EDIT, NNAR & CHNM: NNAR and CHNM will be redirected to transmit directly to the node instead of through EDIT.

Haven't had a decent sized event in awhile so the update probably isn't as complete as I'd like.

Station Problems
MIST -doesn't degain
LVAR- spikes -see image
PARM.HN* -see image
LEPT.EHN -see image
HOVM -spikes and dropping out

Muted Amplitude

Arkansas network problems
WLAR - still dropping out
WLAR - strong motion station down

Mag. 4.0 gain range problems
These stations had problems with the gain channel during the Magnitude 4 Missouri event on Feb 21, 2012. It isn't clear to me whether they data channels saturated or whether there was excessive chatter in the gain channel. See image.

GNAR drifted dramatically when the weather got cold over Thanksgiving break. A recenter temporarily fixed it. Get your shovel ready Dave, we need more insulation around the vault.

NODE Tasks




We're using propane too fast. We need to let the level, currently 35%, go down before repairing the leak.


G and D and the local EMA installed a 25kW generator to power that side of the building. If there's room power-wise would they let us power the rack from it too? We could share the maintenance of the generator. We'd also have to install a transfer switch.



Anthony with Cummins Mid-South serviced our 35kW Cummins generator. In addition to other routine maintenance he had to replace both fuel filters to get it to start and run properly. It worked fine during the power outage last week. He said the fuel lift pump, battery & air filter should also be replaced and they will send a quote to PP for that follow up work.

Twisted pair from Richardson is extremely noisy causing problems with the analog backbone. Richardson is also on the UM 5-year capital improvement plan to be replaced.

Visit to WKNO tower on south campus was good. The building is URM so we want to minimize our footprint inside. There isn't a good telemetry shot to CERI so we'd need to move the ceri node (e.g. mudworm and associated rack, dbb firewall, etc) to the tower. Mitch is checking with ITD about bandwidth.

Jim asked about the feasibility of putting a 100 foot freestanding tower on the CERI campus. Hardware should cost around $7k if we do it ourselves. We'd need a bigger jin pole. Mitch and Jim will get together to develop a more detailed proposal to request permisson from the University.


MCAR is the only remaining station coming in via gcf2ew on anssworm. MCAR loses its connection a half dozen or so times per day. David will install the new terminal server.

Replace foam rubber plugs at all year 1 stations (need to notch it to accomodate the GPS pods): ASAR, CBHT, CUET, MCAR.

CVVA. The saga continues.

We need a single document (access database excel spreadsheet) to document information on all freefield strongmotion stations to include contact(s), current IP's(eternal/external), what ports are allowed in from what IP's here at CERI, telnet yes or no, trigger levels etc. etc.

Steve is assessing communications so that we can tir off loose ends.




LRVA and VHTN are on deck for upgrades with the Basalts from the Depot.

GTTN.HNE -see image

Unknown problem
BCRT.EHN- muted amplitude
RBNC.EHE -see image
WSNC - interference spikes
TVNC- interference spikes
RBNC- interference spikes
SMNC - interference spikes
CSTN - still gappy

GTTN move to the new tower is complete. But the new tower is only a 100' from the sensor pit and its big. This is now by far the noisiest station in the network. The top is entirely covered by the antenna farm and the surrounding area is either houses, or very steep. There is a TA station, V52A going in nearby. Mitch will see if they've selected a site yet.


Generator is not functional despite EMA's effort to repair. Consider additional battery for starworm.

If they get the generator working, a generator on alarm would be useful. Do we have this at other nodes (e.g. Memphis and LNXT)?

BHT move. The MOU with the Catoosa WMA for Pilot Knob is going very slowly. John found a nearby location on Pilot Mt (different from Pilot Knob Mt) with a privately owned tower. The area surrounding it is owned by the Appalachian Conservancy. The tower owner is amenable. John will persue as an alternative to The Catoosa WMA.


All stations coming in about 7 seconds early. IRIG is good and adsend is locked. Must be a problem with the antenna or the XLAK. The road is currently impassable. John is monitoring for first opportunity to visit.

RBNC and CCNC need new radio pairs.

Battery backup is reinstalled but there is still a problem. Currently has only an Off the shelf UPS.

Central Receive: Still have interference. John is scheduled to meet with the engineer for the radio station this week. If he confirms we're being interfered with, then BRB will ask the ham operator to fix the problem or power down.

MTTN Node ASTN: Change to AC power. We have permission and can install anytime.


AG Network

WLAR has large latencies and poor internet connection. Something odd is also going on with the Reftek and it may be losing power or cycling. Works fine with no outages when the reftek is operating at the VC connected directly to the router. So the problem must be between the station and the router. This could be a candidate for a cell modem.

Steve H wants to redeploy the portables. Bee Branch is the top of Holly's wish list.


Three 6TD's are out for repair. Langston requested 2 for the Death Vally field trip.


NSMP Station List.


The seisnet group on umdrive is at You will need your uuid and password.