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Changes for page Seismometers

Last modified by robert on 2025/06/15 15:01
From version 1.1
edited by robert
on 2023/12/11 11:35
Change comment: There is no comment for this version
To version 33.1
edited by Jack Dent
on 2025/01/02 11:13
Change comment: There is no comment for this version

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1 -Seismometers2
1 +Seismometers
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1 -XWiki.robert
1 +XWiki.JackD
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15 -= Paragraph 1 =
5 += Broadband sensors =
16 16  
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7 +Broadband (or BB) sensors are especially sensitive to low-frequency energy and are //broad//ly defined as any instrument capable of **reliably recording wave periods greater or equal to 10 seconds**. This makes them useful for the analysis and detection of teleseismic earthquakes as well as techniques involving ambient noise. However, they are also well-suited for measuring high-frequency energy, limited only by the Nyquist frequency of the [[data logger>>doc:Instrumentation.ANU LPR-200.WebHome]]'s sampling rate. The downside to broadband sensors is usually their cost, size, and fragility relative to short-period sensors.
18 18  
19 -== Sub-paragraph ==
9 +== Nanometrics ==
20 20  
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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.
22 22  
23 -== Sub-paragraph ==
13 +=== Trillium Compact 120 ===
24 24  
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15 +The Trillium Compact 120 has a recording range between 120 seconds and 100Hz.
26 26  
27 -=== Sub-sub paragraph ===
17 +What info?
28 28  
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19 +- Recording frequency range?
30 30  
21 +- Sensitivity?
31 31  
32 -= Paragraph 2 =
23 +- Adjustable feet and levelling bubble?
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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]]
35 35  
36 -== Sub-paragraph ==
27 +=== Trillium Compact 20 ===
37 37  
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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.
39 39  
40 -== Sub-paragraph ==
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]]
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33 +(% style="color:inherit; font-family:inherit; font-size:max(18px, min(20px, 14.4444px + 0.462963vw))" %)Trillium Compact Posthole
44 44  
35 +The Trillium Compact Posthole is designed with a robust casing allowing it to be deployed without a vault or protective case.
45 45  
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 +
39 +=== Trillium Compact Horizon ===
40 +
41 +=== SmartSolo Broadbands ===
42 +
43 +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.
44 +
45 += Short period sensors =
46 +
47 +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.
48 +
49 +=== Lennartz Electronic LE-3D Lite (MkII) ===
50 +
51 +etc
52 +
53 +=== SmartSolo Short periods ===
54 +
55 +Two types of SmartSolo brand seismometers are currently available, one of which is a short-period seismometer. More information is available on the SmartSolo Seismometers page.
56 +
57 +etc
58 +
59 +
60 +== Channel and Instrument conventions ==
61 +
62 +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/]]
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53 -//Figure 1: [[Sea>>https://commons.wikimedia.org/wiki/File:Isle_of_Icacos_II.jpg]]//
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73 += Trillium Compact 120 =
54 54  
55 -[[image:Templates.Article.Template.WebHome@image2.jpg]]
56 -//Figure 2: [[Waves>>https://commons.wikimedia.org/wiki/File:Culebra_-_Playa_de_Flamenco.jpg]]//
75 += [[image:Trillium compact120.jpg]] =
76 +
77 +|**Frequency Band**|120 seconds to 100 Hz
78 +|**Sensitivity**| 754 V/m/s
79 +|**Size (Diameter x Height)**|9 x 13 cm
80 +|**Weight**|1.1 kg
57 57  )))
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85 += Trillium Compact PostHole 120 =
86 +
87 += [[image:Trillium compact posthole.jpg]] =
88 +
89 +|**Frequency Band**|120 seconds to 100 Hz
90 +|**Sensitivity**| 754 V/m/s
91 +|**Size (Diameter x Height)**|10 x 17 cm
92 +|**Weight**|3.1 kg
58 58  )))
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98 += Lennartz LE-3D-Lite MkII =
99 +
100 += [[image:LE3Dlite.jpg||data-xwiki-image-style-alignment="~"center~""]] =
101 +
102 +
103 +|**Frequency Band**|1 seconds to 100 Hz
104 +|**Sensitivity**| 400 V/m/s
105 +|**Size (Diameter x Height)**|10 x 10 cm
106 +|**Weight**|1.9 kg
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