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by
Judy Wood
This page last updated, July 30, 2008
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This page is currently UNDER CONSTRUCTION.
Hurricane Erin, September 11, 2001
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Figure 1. (9/11/01) Source:, (9/11/01) Original Image: (more) 010911_1867.jpeg |
Source: website: GIMA GIMAlong.gif |
Information about what is shown in Figures 4-9, below.
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"This is a timeseries of the magnetometer deviations for the indicated UTC day and station. The horizontal and vertical grids are constant for each plot so the user can quickly flip through images looking for quiet and active periods.
he horizontal scale is always a full 24 hours. The vertical grid is 250 nano-Tesla/grid line. The mean value (in nano-Tesla) printed off the right hand edge of the plot is the average magnetic field strength for that day for each component. The magnetic deviation displayed is computed from that value. The H-component (deviations down indicate the local field has dipped southward) has the greatest deviations in that direction and so is plotted on top. The D-component dips are magnetic west deviations as the magnetometer head is oriented in magnetic coordinates not geographic. The Z component is vertical component. Note: Each component is offset by 2 vertical grid boxes (500 nT) where the component letter indicator off the left and the mean value on the right indicate the zero reference point for each curve. This was done so each component could be identified separately and does not reflect the absolute magnitude of the magnetic field of the component." |
Quote 1. Information about what is shown in Figures 4-9, below. website: |
click on images for enlargements.
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Magnetic Anomalies on 9/11/2001 Top
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Figure 2. Source: website:GIMA akmap.gif |
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Figure 3. Grid lines added. (Larger version) (unmarked version1, version2) Original: Source: website: GIMA |
click on images for enlargements.
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A Controlled Environment? Hurricane Erin, (9/1/01 - 9/17/01) Top
Figure 7. Hurricane Erin, September 1-17, 2001 Pressure, wind speed, and relative distance from NYC, from nhc. Source: nhc |
Figure 7a. Hurricane Erin, September 11, 2001, at about 37.4°N, 65.6°W, which corresponds to abut 10:15AM (EDT). Source: website: noaa |
Figure 7b. Best track of Hurricane Erin, September 1-17, 2001 Source: website: nhc |
Figure 8a. Hurricane Erin, September 1-17, 2001 Source: nhc |
Figure 8b. Hurricane Erin, September 1-17, 2001 Source: nhc |
Figure 8a. Hurricane Erin, September 1-17, 2001 Source: nhc |
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Figure 10. H1 website:GIMA |
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Figure 11. D1 website:GIMA |
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Figure 12. Z1 website:GIMA |
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Figure 2. Erin, Temperature Humidity Pressure Dew Point Visibility Wind Speed Wind Direction website: higher-resolution |
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Figure 4. Erin, Humidity, Dew Point, Temperature website: higher-resolution |
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Figure 5. Erin, Humidity, Dew Point, Pressure website: higher-resolution |
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Figure 3. Erin, Wind Speed Wind Direction (direction legned) website: higher-resolution |
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Figure 1. Erin, Frequency of data sampling anomalous moisture website: higher-resolution |
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Figure 8a. Hurricane Erin, September 1-17, 2001 Source: nhc |
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These sign convensions for wind direction provide numerical values that are shown in the graphs. If the wind is fluctuation between East and ENE, there will be a jump in the graph of the E-wind orientation (b). In this case, the W-wind orientation (c) would show a smooth transition in direction. Source: Wood |
click on images for enlargements.
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Figure 8a. Hurricane Erin, September 1-17, 2001 Source: nhc |
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Figure 13. H2 website:GIMA |
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Figure 14. D2 website:GIMA |
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Figure 15. Z2 website:GIMA |
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Figure 2. Erin, Temperature Humidity Pressure Dew Point Visibility Wind Speed Wind Direction (direction legend) Source: website: higher-resolution |
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Figure 4. Erin, Humidity, Dew Point, Temperature Source: website: higher-resolution |
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Figure 5. Erin, Humidity, Dew Point, Pressure Source: website: higher-resolution |
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Figure 3. Erin, Wind Speed Wind Direction (direction legend) Source: website: higher-resolution |
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Figure 1. Erin, Frequency of data sampling anomalous moisture Source: website: higher-resolution |
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Figure 8a. Hurricane Erin, September 1-17, 2001 Source: nhc |
click on images for enlargements.
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Figure 8a. Hurricane Erin, September 1-17, 2001
Source: nhc |
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Figure 19a. H3 website:GIMA |
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Figure 20a. D3 website:GIMA |
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Figure 21a. Z3 website:GIMA |
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Figure 2. Erin, Temperature Humidity Pressure Dew Point Visibility Wind Speed Wind Direction Source: website: higher-resolution |
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Figure 4. Erin, Humidity, Dew Point, Temperature Source: website: higher-resolution |
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Figure 5. Erin, Humidity, Dew Point, Pressure Source: website: higher-resolution |
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Figure 3. Erin, Wind Speed Wind Direction (direction legned) Source: website: higher-resolution |
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Figure 1. Erin, Frequency of data sampling anomalous moisture Source: website: higher-resolution |
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Figure 8a. Hurricane Erin, September 1-17, 2001
Source: nhc |
click on images for enlargements.
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Magnetometer Readings (normalized), 6 stations (6 hours), 9/11/01-3:00 PM (EDT) - 9/11/01-9:00 PM (EDT) Top
(data posted at one-minute intervals)
Figure 8a. Hurricane Erin, September 1-17, 2001 Source: nhc |
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Figure 19b. H6 website:GIMA |
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Figure 20b. D6 website:GIMA |
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Figure 21b. Z6 website:GIMA |
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Figure 2. Erin, Temperature Humidity Pressure Dew Point Visibility Wind Speed Wind Direction Source: website: higher-resolution |
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Figure 4. Erin, Humidity, Dew Point, Temperature Source: website: higher-resolution |
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Figure 5. Erin, Humidity, Dew Point, Pressure Source: website: higher-resolution |
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Figure 3. Erin, Wind Speed Wind Direction (direction legned) Source: website: higher-resolution |
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Figure 1. Erin, Frequency of data sampling anomalous moisture Source: website: higher-resolution |
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Figure 8a. Hurricane Erin, September 1-17, 2001 Source: nhc |
click on images for enlargements.
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click on images for enlargements.
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Reference Sites |
Erin 2001 wind analyses
http://www.aoml.noaa.gov/hrd/Storm_pages/erin2001/wind.html, (archived) Background on the HRD Surface Wind Analysis System http://www.aoml.noaa.gov/hrd/Storm_pages/surf_background.html, (archived) Hurricane Erin 2001 http://www.aoml.noaa.gov/hrd/Storm_pages/erin2001/, (archived) NASA Makes A Heated 3-D Look Into Hurricane Erin's Eye http://www.sciencedaily.com/releases/2005/10/051007090048.htm, (archived) Images and Data from Terra http://terra.nasa.gov/Gallery/ Images http://modis-atmos.gsfc.nasa.gov/IMAGES/index.html , (archived) |
Shortcut links
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Jump to Magnetic Anomalies on 9/11/2001 Jump to Magnetometer Readings (normalized) (14 hours) Jump to Magnetometer Readings (normalized) (36 hours) Jump to Magnetometer Readings (normalized) (96 hours = 4 days) Jump to xxxx |
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