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Location: 52.9257 N, 157.13287 E, 156 m
Sensor: T3409 DAS: 0151 Operating parameters: continuous data streams 1 sps and 40 sps. Station is installed in a vault ~100m from the station operator's house. There is a road nearby which provides medium-level noise; the rest of the noise is from people and farm animals walking around. GPS clock is mounted on a pole outside the vault.[Peyton's notes] Installed: 06/21/98, [Levin, Tokarev, Sinitsyn ] Last data acquired: 08/17/1999 (JD229) |
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Location: 55.193N, 165.98E, 13m
Sensor: T3492 DAS: 0874 Operating parameters: continuous data streams 1sps and 40 sps. The station was installed first time under the floor of a big wooden house on the small concrete pier, next to the strong motion accelerometer operated by KEMSD. Noise level at this site was too high. The station was reinstalled in another vault, 70 meters away from this house, 5 meters down on the big concrete pier, next to short period sensors of KEMSD. This pier seats on a bedrock. Reinstallation was made by Dontsov on 03.15.99 (99:074). The vault had a long (70 m) cable for electric power supply (-12V DC), so Kepco (power system) was in the house, connecting to ~220V and in the vault we got 12.98 V DC. The station connects directly to the power cable without LVD to get enough DC from such a long power cable. DAS and SCSI disk were set on their boxes near the pier. GPS receiver was on the roof in small wooden box. No changes to the components of this station was made during the entire time of acquisition there. Orientation of the sensor was checked both during installation and at the time of relocation of this station. Installed: 07/24/98 [Tokarev, Dontsov ], relocated on 03/15/99 [Dontsov]. Last data acquired: 08/30/1999 (JD242) |
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Location: 55.932N 158.695E
Sensor: T3447 DAS: 382 (98:250-98:339) 914 (99:019-99.233) Operating parameters: continuous data streams 1 sps and 40 sps. Station was installed in the vault of the local seismological station of Esso, operated by KEMSD. It is 4 meters deep, with a huge pier. Power was provided by a 200 meters long copper cable from the house to the vault. The Kepco power supply was in the operator's house, solar panels were on the southern wall of this house and powerboard with acid batteries was placed inside the vault.. The station worked till 10/01/98, when a fire destroyed the small cabin over the vault's entrance. The GPS receiver (which was installed under the roof of the cabin) was destroyed too. Also the shield covering vault's entrance fell down on to the pier and cut main cable between the DAS and the sensor. The cable was initially repaired in place, and later replaced with a new one. On 01/18/99 DAS 382 was replaced by DAS 914, which had a problem with the calibration signal. On 01/31/99 the calibration board RT275G was replaced with RT275C. After that calibration signal worked OK. No other changes or replacements were made during the time of operation. Orientation of the sensor was made by Peyton and remade by Sinitsin. Installed: 09/03/98 [ Park, Peyton, Dontsov] Last data acquired: 08/21/1999 (JD233)
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Location: 54.594N, 161.133E, 68 m
Sensor: T3494 DAS: 0650 Operating parameters: continuous data streams 1 sps and 40 sps. sensor on pier next to another accelerometer setup in basement of house. DAS, etc. is located on 1st floor. Power comes from dry-cell bank, 1 lead-acid battery, 2 solar panels, and a DC generator that is turned on once a week. Station managers are geologists by training, and could easily be called upon for hot disk swap if necessary. Power should be fine, since house runs on DC most of the week and their batteries need charged as well. Microseism was evident in monitors. Noise at station during waking hours, but this was probably elevated due to high traffic level in house from 10 people in house (normally 3). [Fouch's notes, summer 1998] Human traffic inside the house turned out to be a major problem, especially for the horizontal components. [Levin, 01/2000] Installed: 08/24/98, [Fouch, Dontsov] Last data acquired: 08/06/1999 (JD218) |
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Location: 56.258N 162.711E 38m
Sensor: T3501 DAS: 771 Operating parameters: continuous data streams 1 sps and 40 sps. This station was installed in the small underground vault 10 meters away from the house where the local KEMSD seismic station is located the sensor was mounted on the concrete pier, next to short period seismometers. DAS and disk were put into the wooden box near the pier. Two car batteries, power board and two boxes of powerful Russian dry cells were in the main house providing 12V DC to the station via a 15 m long cable. At 12 of Nov. 1998 station stopped because of power failure related to the losses in the cable. On 01/30/99 the power sources was reconnected [Dontsov] to get more DC on the another end of this cable inside the vault, it was 11.98 V when DAS, Disk and GPS receiver were all on , taking more electricity. Therefore Kepco was connected to the power cable, bypassing the LVD (orange box), and a 55 A/h battery was connected directly to the cable as well. But dry cells, 95 A/h battery and solar panels were connected through LVD, and after such improvement the station got 12.7 V on average. This gave relatively constant DC supply during the remainder of operation. During the work on power supplies the GPS receiver was exchanged for another one, probably with lower power consumption, because two other receivers refused to get locked on sattelite with same electricity supply on. No other changes of parts of the station were made during the time of operation. Orientation of the sensor was made by Peyton and it was right [upon removal? VL]. Installed: 09/04/98 [ Park, Peyton, Dontsov] Last data acquired: 08/26/1999 (JD238) NOTE: KEMSD station see the pictures |
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Location: DAS GPS FIX, JD 249, 1998: 54.694N, 158.582E, 44 m
Sensor: T3476 DAS: 0586 Operating parameters: continuous data streams 1 sps and 40 sps. Station is installed in a vault set into a hillock. Low-level noise is provided by people and farm animals. The disk was moved off the pier and duct-taped onto the top of a spare Sbox. The GPS clock is mounted on a pole on top of the hillock.[Peyton's notes, summer 1998] Analysis of data showed that the sensor was installed backwards (S and N switched). Data archived in the DMC bears a note of this in the SEED header [Levin 01/2000] Installed: 06/22/98, [Levin, Sinitsyn, Titkov]
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Location: 59.261N 163.084E
Sensor: T3459 DAS: 1025 Operating parameters: continuous data streams 1 sps and 40 sps. The station was installed in a small underground vault with a wooden shelter on top of it, 20 meters away from the log cabin that hosts the local KEMSD seismic station. 220 V AC for Kepco power supply was available in the cabin, but from Kepco to the station 12V DC was carried by a dual-wire copper cable. The space was really small for the station (1.5mX1.0mX 1.65m) but there was a small shelf for DAS and Disk, and sensor had enough space to be covered with big styrofoam box. There was a problem with the GPS clock not locking, related to the slate roof of the shelter above the vault. Apparently, GPS signal cannot penetrate such material as slate. It took a while to figure this out... Station started working after Dontsov's visit on 23rd of Feb. 1999. But there was one time long gap in acquisition because of lower DC voltage. The 4.4 Gb disk required more electricity than expected and causes a power outage. Except for one exchange of GPS clocks no other changes to the components were made during the experiment. The sensor was remounted one more time by Dontsov [02/23/99? VL] and orientation to the norh was checked too. Installed: 10/29/98 [Tokarev, Stepanov]
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Location: 59.095N 159.968E
Sensor: T3472 DAS: 0575 Operating parameters: continuous data streams 1 sps and 40 sps. Station was installed in a vault located on the southern slope of a hill, approximately 50 meters high up on the slope in the northern part of the Palana settlement, very close to local water pump station (30 m away) and to powerful electric substation. Both are making some seismic noise there. There is small wooden cabin above that vault and GPS receiver was placed just left from the entrance door atop of vertical log which is half of the hight of the cabin, so the GPS had very poor access to the open sky. Such location gave just a few satellite locks per day (clock locking was very irregular during each day of the acquisition there). No changes to the components of this station were made during the whole time of the experiment. The sensor was initially installed tightly wrapped in foam. This was probably the cause of the sensor often relevelling itself and fairly high noise level [???]. Once discovered, this problem was corrected on 03/30/99. The pier was cleaned from concrete dust and small concrete particles and the sensor was reinstalled. Orientation was checked before setting it down. [Dontsov's notes] One horizontal component of the sensor (channel 5 - nominal N) had a mysterious problem, recording at a much lower gain then the other two. Cause is under investigation [Levin, 03/2000]
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Location:
Sensor: T3431 DAS: 0901 Operating parameters: continuous data streams 1 sps and 40 sps. Station is installed in a vault located inside of a small hill ~20m from the station operator's house. The pier is isolated, but does not appear to go down to bedrock. The power board, battery, and Kepco are in the station operator's house and power runs out to the vault via a buried 2-conductor cable. GPS is mounted on a pole in the hill above the vault. The sensor and station boxes are in the station operator's house. [Peyton's notes] The station had some problems with electric power during March of 1999. AC ~220 V was brought to the vault, and power board with Kepco were moved into the vault too. No changes to the components of this station was made. Orientation of the sensor was correct [upon removal]. [Dontsov's notes] Installed: 08/16/98, [Park, Fouch, Tokarev, Peyton]
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Location: 54.3E 155.96N
Sensor: T3510 DAS: 388 Operating parameters: continuous data streams 1 sps and 40 sps. The station was installed in a small room on the first floor of a small two-story concrete building which belongs to a local meteorological station. The entire first floor is a huge concrete plate. The building is 100 meters away from the road to Sobolevo airport and two days a week this road can be busy, also there are few sources of noise closer to the installation- few vehicles of the meteostation and electric generator. The sensor was mounted on that concrete plate, DAS, disk, battery -on the shelf nearby. GPS receiver was taken outside on the small balcony of the second floor of this building. There were some severe shortages with 220V AC electricity from the day of installation till 5th or 10th of Feb. 1999. The station worked from dry cells and a car battery which was charged by diesel generator of the meteostation three times a day. Then the huge gap in acquisition occured between days ??? and 131? of 1999 (February through May). Apparently, someone entered the room and struck against the cable between sensor and DAS, cable was on the floor there and the sensor was displaced. It remained vertical but diagonally to the floor, staying on two legs and on the edge of bottom side of the sensor. After 05/11/1999 (JD131) the station worked without problems till September 1999. No changes to the complectation of this station were made during the entire time of installation Installed: 12/09/98 [Dontsov, Semchenko] Last data acquired: 09/10/1999 (JD253) |
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Location: 57.759E 158.685N 45m
Sensor: T3462 DAS: 902 Operating parameters: continuous data streams 1 sps and 40 sps. Installed: 10/06/98 [Titkov, Fedorov] Last data acquired: 08/26/1999 (JD238) NOTE: KEMSD station see the pictures |
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Location: 60.446N 166.148E
Sensor: T3519 DAS: 0920 Operating parameters: continuous data streams 1 sps and 40 sps. This station was placed in a log one-story house of the local water pump station, 10 kilometers away from the Tilichicki settlement. It is a quiet place, but there is a road along this site, with some traffic. An underground shelter 1.5 m deep was made for the sensor 4 m away from the wall of the house, in front of the window of the room housing other components (DAS, disk, battery and power board). GPS receiver was mounted on a pole attached to the wall of this house (see the pictures). The station had a problem with the GPS clock during and after installation. The problem persisted untill 02/22/99, and eventually was traced to a bad cable, probably burnt in part and/or improperly connected. After a change of cable the clock worked OK till the end of the experiment. Also, the was a problem with the underground shelter for the sensor. Its wide entrance let some ice and water in. The ice and low temperatures (near -40F) caused some tilting of the small pier there, up and down, therefore the sensor always fought with this and releveled itself often. Installed: 10/22/98 [Tokarev, Stepanov] Last data acquired: 09/03/1999 (JD246) |
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Location: 55.203N 160.399E Sensor: T3461
DAS: 0646 Operating parameters: continuous data streams 1 sps and 40 sps. Tumrok is a one-man town with five cabins for hunters passing through. The station is installed in the potatoe cellar of one of the cabins. Tumrok gets very cold (below 40 degrees Celcius), so the DAS and Disk are installed in the potatoe cellar on a shelf above the sensor. There are three layers of styrofoam between the instruments and the lid of the cellar. Power is supplied by two solar panels (set up to maximize sun collection in the middle of winter) outside the cabin, a large car battery, and 40 deep-cycle marine dry cells (hooked up in four parallel groups). There is a generator which will (ideally) be run once a week to recharge the car battery. The GPS clock is mounted on a small shelf under one of the roof eaves and locked reliably. The sensor and station boxes are on the floor of the cabin above the equipment.[Peyton's notes, summer 1998] Attempts to improve the power supply in late October of 1998 caused it to fail, with station out of commision until day 98:360 [Levin, 12/1999] Installed: 08/26/98, [Park, Chebrov, Peyton]
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Location: 57.094N 156.766E
Sensor: T3480 DAS: 0596 Operating parameters:continuous data streams 1 sps and 40 sps. The site was located in a small cabin at the pumping station 3-4 km south-east of the Ust-Kharyuzovo settlement, ~10km away from the Okhotsk sea, and 5 m above its level. The choice of the site was driven in part by the fact that there are no shortages with 220V AC electricity there, because it is a vitally important object for the settlement. Electricity was never shut off during the entire time of the experiment. The site (as well as the entire coast) is marshy and the cabin is a relatively dry spot. The cabin is set on a deep concrete basement. The sensor was installed on the floor of the cabin, with DAS, disk, power board and battery placed nearby. GPS receiver was installed on the roof of the cabin, covered with sheets of rubber for protection from precipitation and stranger's eyes. This cabin has double door entrance, two windows garded with iron bars. It looks like no big gaps in the acquisition have taken place during time 10/05/98 till 09/10/99 and no exchanging of any parts of the equipment, except changing full disk with data to an empty one. Orientation of the sensor was rechecked twice during experiment by Dontsov. [Dontsov's notes] Sensor had some leveling problems, possibly related to the seasonal tilting of the entire structure due to the marsh freezing and thawing. [Levin] Installed: 10/05/1998 [Dontsov, Semchenko] Last data acquired: 09/09/1999 (JD252) |
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Location: 54.082N, 159.988E
Sensor: T3301 DAS: 0192 Operating parameters: continuous data streams 1 sps and 40 sps. ZUP - sensor on pier next to Oleg Dontsov's 3-component accelerometer. Styrofoam was cut small to accomodate this; it's probably a little too small since it presses the sensor cable against the sensor in one place. Non-ideal setup, but should be OK unless noise levels (other than microseism) are high, because station is located on the small flat peninsula built by bedrock and there is noise from Pacific surf and from Karimski volcano blasts (?) [Volcano's "breath" dominates the signal at this site 01/2000, Levin]. Power comes from dry-cell bank, 1 lead-acid battery, 2 solar panels, and a DC generator that is turned on once(?) a week. No changes were done to this station during the time of experiment. Orientation was checked and it was right.[Fouch's notes, Dontsov's notes] Installed: 08/24/98, [Fouch, Sinitsyn, Fedorov]
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