Posted: Jun. 22, 2018, 9:00 (UTC)
Overviews
Observation time (UTC) | Orbit number | Observation mode | Polarization | Observation direction | Beam number | |
① | June 11, 2018 | 93 | Spotlight | HH | Right | - |
② | June 13, 2018 | 85 | Spotlight | HH | Left | - |
③ | June 14, 2018 | 186 | Stripmap 10m | HH+HV | Right | F2_5 |
④ | June 16, 2018 | 94 | Spotlight | HH | Right | - |
⑤ | June 19, 2018 | 89 | Stripmap 10m | HH+HV | Right | F2_6 |
*Please see ALOS-2/PALSAR-2 Observation Result for Eruption of Mt. Kilauea and Earthquake in Hawaii(3) for observations between June 1 and 9, ALOS-2/PALSAR-2 Observation Result for Eruption of Mt. Kilauea and Earthquake in Hawaii(2) for observations between May 22 and 30, and ALOS-2/PALSAR-2 Observation Result for Eruption of Mt. Kilauea and Earthquake in Hawaii for observations before May 22.
Figure 2 is an animation around Haleamumau Crater using ALOS-2 PALSAR-2 images acquired on April 21, June 11, and Jun 16, 2018. These images show the process of subsidence and collapse in the crater.
Figure 3 shows three-dimensional displacement field around Halemaumau Crater revealed by two pixel-offset results (April 16 and June 11, 2018, and February 10, 2016 and June 13, 2018). The vectors and contour show the horizontal and vertical displacement. The result shows the horizontal displacement up to 9 m and the subsidence up to 17 m, respectively.
Figure 4 shows an interferogram using the ALOS-2 PALSAR-2 data acquired on May 22, and June 19, 2018. This image shows ~10 cm displacement away from the satellite (subsidence or eastward) around in Leilani Estates (white-dotted circle). The distribution of the displacement coincides with that of the lava flow, which may imply the surface depression due to lave cave compaction.
Figure 5 shows a color-composite image (red: May 22 HV polarization, green: June 19 HV pol., blue: June 19 HH pol.) where eruptive fissures and lava flow can be seen in red color. This image shows the area of lava flow has been expanding compared with the previous image.
We will continue to monitor Mt. Kilauea by ALOS-2.
Reference:
ALOS-2/PALSAR-2 Observation Result for Eruption of Mt. Kilauea and Earthquake in Hawaii(3).
ALOS-2/PALSAR-2 Observation Result for Eruption of Mt. Kilauea and Earthquake in Hawaii(2).
ALOS-2/PALSAR-2 Observation Result for Eruption of Mt. Kilauea and Earthquake in Hawaii.
About Pixel offset technique.
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