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Changes for page Seismometers

Last modified by robert on 2026/01/15 17:32
From version 49.1
edited by robert
on 2026/01/14 12:01
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To version 32.1
edited by Jack Dent
on 2025/01/02 10:47
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1 -XWiki.robert
1 +XWiki.JackD
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8 8  
9 9  == Nanometrics ==
10 10  
11 -Currently, 4 kinds of nanometric broadband seismic sensors are available. The Trillium Compact 120s, Trillium Compact 20s, Trillium Compact Posthole, and most recently, the Trillium Compact Horizon. These seismometers are ideal for long-term deployments of multiple months. All of these seismometers are compatible with the LPR-200 and TSAWR loggers and are designed for low energy consumption.
11 +Currently, 4 kinds of nanometric broadband seismic sensors are available. The Trillium Compact 120, Trillium Compact 20, Trillium Compact Posthole, and most recently, the Trillium Compact Horizon. These seismometers are ideal for long-term deployments of multiple months. All of these seismometers are compatible with the LPR-200 and TSAWR loggers and are designed for low energy consumption.
12 12  
13 -=== Trillium Compact 120s ===
13 +=== Trillium Compact 120 ===
14 14  
15 -The Trillium Compact 120s has sensitivity band between 120 seconds and 100 Hz but is prone to corrosion when buried for long periods. They have a tilt tolerance of ~~10° but come with adjustable feet for leveling.
15 +The Trillium Compact 120 has a recording range between 120 seconds and 100Hz.
16 16  
17 - For more information, refer to the [[Nanometrics Trillium Compact information sheet>>https://nanometrics.ca/hubfs/Downloads/Data%20Sheets/trillium_compact.pdf?hsLang=en-ca]]
17 +What info?
18 18  
19 -=== Trillium Compact 20s ===
19 +- Recording frequency range?
20 20  
21 -The Trillium Compact 20s looks identical to the Trillium Compact 120s and has a recording range between 20 seconds and 100 Hz. but is prone to corrosion when buried for long periods. They have a tilt tolerance of ~~10° but come with adjustable feet for leveling.
21 +- Sensitivity?
22 22  
23 -For more information, refer to the [[Nanometrics Trillium Compact information sheet>>https://nanometrics.ca/hubfs/Downloads/Data%20Sheets/trillium_compact.pdf?hsLang=en-ca]]
23 +- Adjustable feet and levelling bubble?
24 24  
25 -(% style="color:inherit; font-family:inherit; font-size:max(18px, min(20px, 14.4444px + 0.462963vw))" %)Trillium Compact Posthole
25 +For more information, refer to the Nanometrics instrument information sheet: [[https:~~/~~/nanometrics.ca/hubfs/Downloads/Data%20Sheets/trillium_compact.pdf?hsLang=en-ca>>https://nanometrics.ca/hubfs/Downloads/Data%20Sheets/trillium_compact.pdf?hsLang=en-ca]]
26 26  
27 -The Trillium Compact Posthole is designed with a robust casing allowing it to be deployed via direct-burial without a vault or protective case. It does NOT have leveling feet nor a bubble (**bring your own!**), nor can its mass be rebalanced. The cable is also quite a bit more stiff so may require burial at an increased depth. If installed inside a vault, the cable may also unbalance the sensor if left by itself. The instrument response is identical to a Trillium Compact 120.
27 +=== Trillium Compact 20 ===
28 28  
29 -For more information, refer to the [[Nanometrics Trillium Compact PH information sheet>>https://nanometrics.ca/hubfs/Downloads/Data%20Sheets/trillium_compact_ph.pdf?hsLang=en-ca]]
29 +The Trillium compact has a recording range between 20 seconds and 100Hz. These instruments also have a tilt tolerance of 10° making for efficient deployment.
30 30  
31 -=== Trillium Compact Horizon ===
31 +​​​​​​​For more information, refer to the Nanometrics instrument information sheet: [[https:~~/~~/nanometrics.ca/hubfs/Downloads/Data%20Sheets/trillium_compact.pdf?hsLang=en-ca>>https://nanometrics.ca/hubfs/Downloads/Data%20Sheets/trillium_compact.pdf?hsLang=en-ca]]
32 32  
33 -The Trillium Compact Horizon is sort of a mix between the Posthole and Compact 120, ideal for shallow direct bury deployments or instances where packing weight and size is an important consideration. Its response and sensitivity is identical to the Trillium Compact 120s.
33 +(% style="color:inherit; font-family:inherit; font-size:max(18px, min(20px, 14.4444px + 0.462963vw))" %)Trillium Compact Posthole
34 34  
35 -=== SmartSolo Broadbands ===
35 +The Trillium Compact Posthole is designed with a robust casing allowing it to be deployed without a vault or protective case.
36 36  
37 -Two types of SmartSolo brand seismometers are currently available, one of which is a broadband seismometer. More information is available on the [[SmartSolo Seismometers page>>doc:Instrumentation.SmartSolo Nodes.WebHome]].
37 +For more information, refer to the Nanometrics instrument information sheet:  [[https:~~/~~/nanometrics.ca/hubfs/Downloads/Data%20Sheets/trillium_compact_ph.pdf?hsLang=en-ca>>https://nanometrics.ca/hubfs/Downloads/Data%20Sheets/trillium_compact_ph.pdf?hsLang=en-ca]]
38 38  
39 +=== Trillium Compact Horizon ===
40 +
41 +=== ===
42 +
39 39  = Short period sensors =
40 40  
41 41  Short-period (SP) sensors have limited sensitivity to longer periods, but are otherwise perfectly suitable for earthquake or other high-frequency analysis. They are generally defined as any instrument that begins to **lose sensitivity at periods larger than 10 seconds**. They tend to be smaller and more mechanically robust to broadband sensors.
42 42  
43 -=== Lennartz Electronic LE-3D Lite (MkII) ===
47 +== Lennartz Electronic LE-3D Lite (MkII) ==
44 44  
45 -The LE-3D Lite are small, robust, short period sensors with a a corner period of 1 second.
49 +etc
46 46  
47 -=== SmartSolo BD3C-5 ===
51 +== Sub-paragraph ==
48 48  
49 -Sometimes erroneously referred to as a "broadband node", the larger cylinder-shaped BD3C-5 is technically a //short period //instrument as it has a corner period of 5 seconds (< 10). It is still a high gain seismometer however (e.g. channels ?H[NEZ]). More information is available on the [[SmartSolo Seismometers page>>doc:Instrumentation.SmartSolo Nodes.WebHome]].
53 +etc
50 50  
51 -== Geophone Sensors ==
52 52  
53 -"Geophones" are technically "very short period", with corner frequencies >= 5 Hz. ANSIR currently have two geophone-type sensors available for loan: the 3-Channel SmartSolo IGU-16HR and 1-Channel SmartSolo IGU-16, both with 5 Hz (0.2 second) corners.
56 +== Channel and Instrument conventions ==
54 54  
55 -The center character in the channel codes should be "P", e.g. DPN, DPE, DHZ for 250 Hz.
56 -
57 -(% class="box warningmessage" %)
58 -(((
59 -Note that SmartSolo branded geophone channels have inverted polarity relative to traditional standards!!! This applies only to the IGU-16HR instruments and NOT the BD3C-5 instruments.
58 +We follow FDSN guidelines for sensor channel and type naming conventions, outlined at [[SAGE / IRIS>>https://ds.iris.edu/ds/nodes/dmc/data/formats/seed-channel-naming/]]
60 60  )))
61 61  
62 -= Channel and Instrument conventions =
63 -
64 -We follow FDSN guidelines for sensor channel and type naming conventions, outlined at [[SAGE / IRIS>>https://ds.iris.edu/ds/nodes/dmc/data/formats/seed-channel-naming/]] and also copied below:
65 -
66 -|=Band code|=Band type|=Sample rate (Hz)|=Corner period (sec)
67 -|F|…|≥ 1000 to < 5000|≥ 10 sec
68 -|G|…|≥ 1000 to < 5000|< 10 sec
69 -|D|…|≥ 250 to < 1000|< 10 sec
70 -|C|…|≥ 250 to < 1000|≥ 10 sec
71 -|E|Extremely Short Period|≥ 80 to < 250|< 10 sec
72 -|S|Short Period|≥ 10 to < 80|< 10 sec
73 -|H|High Broad Band|≥ 80 to < 250|≥ 10 sec
74 -|B|Broad Band|≥ 10 to < 80|≥ 10 sec
75 -|M|Mid Period|> 1 to < 10|
76 -|L|Long Period|≈ 1|
77 -|V|Very Long Period|≈ 0.1|
78 -|U|Ultra Long Period|≈ 0.01|
79 -|R|Extremely Long Period|≥ 0.0001 to < 0.001|
80 -|P|On the order of 0.1 to 1 day ^^1^^|≥ 0.00001 to < 0.0001|
81 -|T|On the order of 1 to 10 days ^^1^^|≥ 0.000001 to < 0.00001|
82 -|Q|Greater than 10 days ^^1^^|< 0.000001|
83 -)))
84 -
85 85  (% class="col-xs-12 col-sm-4" %)
86 86  (((
87 87  {{box title="**Contents**"}}
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90 90  
91 91  (% class="box" %)
92 92  (((
93 -== Trillium Compact 120s ==
69 += Trillium Compact 120 =
94 94  
95 -[[image:Trillium compact120.jpg]]
71 += [[image:Trillium compact120.jpg]] =
96 96  
97 97  |**Frequency Band**|120 seconds to 100 Hz
98 98  |**Sensitivity**| 754 V/m/s
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102 102  
103 103  (% class="box" %)
104 104  (((
105 -== Trillium Compact PostHole 120s ==
81 += Trillium Compact PostHole 120 =
106 106  
107 -[[image:Trillium compact posthole.jpg]]
83 += [[image:Trillium compact posthole.jpg]] =
108 108  
109 109  |**Frequency Band**|120 seconds to 100 Hz
110 110  |**Sensitivity**| 754 V/m/s
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112 112  |**Weight**|3.1 kg
113 113  )))
114 114  
115 -(% class="box" %)
116 -(((
117 -== Trillium Compact Horizon ==
118 118  
119 -[[image:20250305_100107.jpg]]
120 -
121 -|**Frequency Band**|120 seconds to 100 Hz
122 -|**Sensitivity**|754 V/m/s
123 -|**Size (Diameter x Height)**|8.6 x 13.8 cm
124 -|**Weight**|1.1 kg
125 -)))
126 -
127 127  (% class="box" %)
128 128  (((
129 -== Lennartz LE-3D-Lite MkII ==
94 += Lennartz LE-3D-Lite MkII =
130 130  
131 -[[image:LE3Dlite.jpg||data-xwiki-image-style-alignment="~"center~""]]
96 += [[image:LE3Dlite.jpg||data-xwiki-image-style-alignment="~"center~""]] =
132 132  
133 133  
134 134  |**Frequency Band**|1 seconds to 100 Hz
20250305_100107.jpg
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