Realtime data from BOTPT-A303-MJ03D - International District
PAGE 2 - ENGINEERING DATA
This page displays plots of realtime data (updated every 15 minutes) from one of four BPR/Tilt (BOTPT) instruments at Axial Seamount, part of the National Science Foundation's (NSF) Ocean Observatories Initiative (OOI) Cabled Array seafloor observatory, operated by the University of Washington. The BPR/Tilt instruments have 4 sensors: 1) a nano-resolution bottom pressure recorder (NANO), 2) a high-resolution tiltmeter (LILY), 3) a low-resolution tiltmeter (IRIS) , and 4) a coarse-resolution tiltmeter (HEAT). The IRIS and HEAT data are shown on this page; the NANO-BPR and LILY data are displayed on the "Primary Data Plots" page (link below). The dates/times in the plots below are in GMT (+8 hrs of local PST, or +7 hrs of PDT time on the US west coast).
LINK TO PAGE WITH PRIMARY DATA PLOTS
LINK BACK TO PAGE WITH MAPS AND OTHER INSTRUMENTS
Bottom Pressure Recorder (NANO-BPR)
The NANO-BPR sensor precisely measures the pressure of
the overlying ocean. The raw BPR pressure data are converted to depth (blue) and include the ocean tides.
After subtracting predicted tides, the de-tided signal (red)
shows vertical movements of the seafloor and other residual signals. Separate plots below show (1) the last 7 days of pressure data, (2) the last 6 months of pressure data, (3) data since the 2015 eruption, and (4) the entire OOI time-series, all with and without tides.
Plot 1: NANO-BPR pressure data showing equivalent seafloor height (in meters), with and without tides, over the last 7 days.
Plot 2: NANO-BPR pressure data showing equivalent seafloor height (in meters), with and without tides, over the last 6 months.ONLY UPDATED ONCE PER DAY.
Plot 3: NANO-BPR pressure data showing equivalent seafloor height (in meters), with and without tides, since 25 April 2015. ONLY UPDATED ONCE PER DAY.
Plot 4: NANO-BPR pressure data showing equivalent seafloor height (in meters), with and without tides, over the entire record. ONLY UPDATED ONCE PER DAY.
Low-resolution tiltmeter (IRIS)
A low-resolution tiltmeter (IRIS) is needed to put the high-resolution tilt measurements (LILY) into context. This instrument measures the tilt less precisely than the LILY tiltmeter, but it has a much larger dynamic range. Below are plots of X- and Y-tilt without temperature, followed by similar plots with temperature.
Plot 5: X-axis (left, blue) and Y-axis (right, pink) low-resolution IRIS tilts (in degrees), over the last 7 days.
Plot 6: X-axis (left, blue) and Y-axis (right, pink) low-resolution IRIS tilt (in degrees), since 25 April 2015.. ONLY UPDATED ONCE PER DAY.
Plot 7: X-axis (left, blue) and Y-axis (right, pink) low-resolution IRIS tilt (in degrees), over the entire record. ONLY UPDATED ONCE PER DAY.
Plot 8: X-axis and Y-axis low-resolution IRIS tilt (in degrees) and temperature (C), over the last 7 days.
Plot 9: X-axis and Y-axis low-resolution IRIS tilt (in degrees) and temperature (C), since 25 April 2015. ONLY UPDATED ONCE PER DAY.
Plot 10: X-axis and Y-axis low-resolution IRIS tilt (in degrees) and temperature (C), over the entire record. ONLY UPDATED ONCE PER DAY.
Coarse-resolution tiltmeter (HEAT)
A coarse-resolution tiltmeter is needed to put the higher-resolution tilt measurements into context. This instrument measures the tilt to the nearest degree (a million times less precise than the LILY tiltmeter), but it has a much larger dynamic range, so it shows us the gross orientation of the instrument on the seafloor. The data from this low-resolution tiltmeter are not expected to change with time, but we plot them here anyway.
Plot 11: X-axis and Y-axis low-resolution tilt (in degrees) and temperature (C), over the last 7 days.
Plot 12: X-axis and Y-axis low-resolution tilt (in degrees) and temperature (C), over the entire record. ONLY UPDATED ONCE PER DAY.