Station 46022 (LLNR 500) - EEL RIVER - 17NM WSW of Eureka, CA Image indicating link to RSS feed of recent meteorological observations for station 46022


Conditions at 46022 as of
(10:10 pm PST on 12/24/2025)
0610 GMT on 12/25/2025:
     

Click on the graph icon in the table below to see a time series plot of the last five days of that observation.

5-day plot - Wind Direction Wind Direction (WDIR):ESE ( 120 deg true )
5-day plot - Wind Speed Wind Speed (WSPD): 13.6 kts
5-day plot - Wind Gust Wind Gust (GST): 17.5 kts
5-day plot - Atmospheric Pressure Atmospheric Pressure (PRES):29.42 in
5-day plot - Air Temperature Air Temperature (ATMP): 54.1 °F
5-day plot - Water Temperature Water Temperature (WTMP): 54.7 °F
5-day plot - Dew Point Dew Point (DEWP): 48.6 °F
5-day plot - Wind Speed at 10 Meters Wind Speed at 10 meters (WSPD10M): 15.5 kts
5-day plot - Wind Speed at 20 Meters Wind Speed at 20 meters (WSPD20M): 15.5 kts
5-day plot -  Wind Speed, Wind Gust and Atmospheric Pressure Combined plot of Wind Speed, Gust, and Air Pressure
Supplemental Measurements
Highest 1-minute Wind Speed
Time (PST)5-day plot - 1-Minute Wind Speed WSPD 5-day plot - 1-Minute Wind Direction WDIR
10:02 pm 15.5 kts-
Previous observations
TIME
(PST)
5-day plot - Wind Direction
WDIR
 
5-day plot - Wind Speed
WSPD
kts
5-day plot - Wind Gust
GST
kts
5-day plot - Wave Height
WVHT
ft
5-day plot - Dominant Wave Period
DPD
sec
5-day plot - Average Wave Period
APD
sec
5-day plot - Mean Wave Direction
MWD
 
5-day plot - Atmospheric Pressure
PRES
in
5-day plot - Pressure Tendency
PTDY
in
5-day plot - Air Temperature
ATMP
°F
5-day plot - Water Temperature
WTMP
°F
5-day plot - Dew Point
DEWP
°F
5-day plot - Salinity
SAL
psu
5-day plot - Visibility
VIS
nmi
5-day plot - Tide (above MLLW)
TIDE
ft
2025-12-24 10:00 pm SE 15.5 19.4----29.42-0.05 54.5 54.5 47.3---
2025-12-24 09:50 pm SE 15.5 21.4 5.9 116.4WNW29.42- 54.3 54.5 47.7---
2025-12-24 09:40 pmESE 11.7 17.5----29.43- 53.4 54.5 49.1---
2025-12-24 09:30 pm SE 9.7 13.6----29.43- 53.1 54.7 49.3---
2025-12-24 09:20 pmSSE 9.7 13.6 6.9 116.4WNW29.44- 52.7 54.5 49.5---
2025-12-24 09:10 pmSSE 11.7 15.5 6.9-6.4WNW29.44- 52.9 54.5 49.8---
2025-12-24 09:00 pm S 13.6 17.5----29.44-0.04 53.1 54.5 49.6---
2025-12-24 08:50 pm S 15.5 19.4 6.6 116.6WNW29.45- 53.2 54.3 49.3---
2025-12-24 08:40 pm S 15.5 19.4 6.6-6.6WNW29.45- 53.8 54.3 49.3---
2025-12-24 08:30 pm S 15.5 19.4----29.45- 54.1 54.1 48.9---
2025-12-24 08:20 pmSSE 15.5 21.4 6.9 127.0WNW29.45- 54.3 54.1 48.0---
2025-12-24 08:10 pmSSE 17.5 23.3 6.9-7.0WNW29.45- 54.7 54.1 47.8---
2025-12-24 08:00 pmSSE 19.4 25.3----29.45-0.04 55.9 54.1 46.9---
2025-12-24 07:50 pmSSE 17.5 27.2 6.9 117.3 W29.46- 56.7 54.3 46.6---
2025-12-24 07:40 pmSSE 15.5 21.4----29.46- 56.5 54.3 46.9---
2025-12-24 07:30 pm S 15.5 21.4----29.46- 56.3 54.3 48.6---
2025-12-24 07:20 pm S 9.7 11.7 8.9 118.3WNW29.47- 55.8 54.1 49.3---
2025-12-24 07:10 pm S 5.8 9.7 8.9-8.3WNW29.47- 55.4 54.1 49.5---
2025-12-24 07:00 pm SE 3.9 7.8----29.47-0.05 55.6 54.0 48.9---
2025-12-24 06:50 pm SE 5.8 9.7 8.2 107.7WNW29.47- 55.6 54.0 48.7---
2025-12-24 06:40 pm SE 5.8 9.7----29.48- 55.6 54.0 48.0---
2025-12-24 06:30 pmESE 5.8 11.7----29.48- 55.6 54.0 48.2---
2025-12-24 06:20 pmESE 7.8 11.7 9.2 118.2 W29.48- 55.8 54.0 48.0---
2025-12-24 06:10 pmESE 5.8 9.7----29.48- 55.8 54.0 48.6---
2025-12-24 06:00 pmESE 7.8 11.7----29.49-0.04 56.1 54.0 47.7---
2025-12-24 05:50 pm SE 9.7 15.5 9.2 118.3WSW29.49- 56.8 54.0 46.4---
2025-12-24 05:40 pm SE 9.7 13.6 9.2-8.3WSW29.49- 56.5 54.0 46.9---
2025-12-24 05:30 pm SE 7.8 13.6----29.49- 56.3 54.0 47.3---
2025-12-24 05:20 pm SE 9.7 15.5 9.8 118.2WNW29.49- 56.3 54.0 46.9---
2025-12-24 05:10 pm SE 9.7 13.6 9.8-8.2WNW29.49- 56.3 54.0 47.1---
2025-12-24 05:00 pm SE 9.7 15.5----29.50-0.06 56.5 54.0 46.8---
2025-12-24 04:50 pm SE 11.7 15.5 10.2 118.3 W29.50- 56.7 54.0 46.4---
2025-12-24 04:40 pm SE 11.7 15.5----29.51- 56.5 54.0 46.8---
2025-12-24 04:30 pm SE 9.7 13.6----29.51- 55.9 54.0 47.5---
2025-12-24 04:20 pm SE 7.8 11.7 10.5 118.3 W29.51- 55.4 54.0 48.4---
2025-12-24 04:10 pmSSE 7.8 11.7 10.5-8.3 W29.52- 55.4 54.1 48.2---
2025-12-24 04:00 pm SE 7.8 13.6----29.52-0.04 55.2 54.1 48.2---
2025-12-24 03:50 pmSSE 7.8 11.7 9.8 117.9 SW29.53- 55.4 54.1 48.0---
2025-12-24 03:40 pm SE 9.7 13.6----29.53- 55.2 54.1 47.7---
2025-12-24 03:20 pmSSE 11.7 15.5 8.9 117.6WSW29.52- 55.2 54.0 47.5---
2025-12-24 03:10 pmSSE 11.7 17.5 8.9-7.6WSW29.53- 55.2 54.0 47.1---
2025-12-24 03:00 pmSSE 11.7 17.5----29.53-0.07 55.2 54.0 46.8---
2025-12-24 02:50 pm SE 11.7 19.4 8.9 117.5 SW29.53- 55.2 54.0 46.4---
2025-12-24 02:40 pm SE 15.5 21.4----29.54- 55.4 54.0 45.9---
2025-12-24 02:30 pm S 15.5 21.4----29.54- 54.7 54.1 47.3---
2025-12-24 02:20 pmSSE 11.7 19.4----29.54- 54.1 54.1 48.6---
2025-12-24 02:10 pm SE 7.8 11.7----29.55- 53.8 54.1 48.0---
2025-12-24 02:00 pm SE 7.8 13.6----29.55-0.07 53.8 54.1 48.0---
2025-12-24 01:50 pm SE 7.8 11.7----29.55- 53.8 54.1 48.2---
2025-12-24 01:40 pmSSE 9.7 15.5----29.56- 53.8 54.1 47.8---
2025-12-24 01:30 pmSSE 9.7 15.5----29.56- 54.0 54.1 47.8---
2025-12-24 01:20 pmSSE 9.7 13.6 9.8 118.3 W29.57- 53.8 54.1 47.8---
2025-12-24 01:10 pmSSE 11.7 15.5 9.8-8.3 W29.56- 53.4 54.0 47.7---
2025-12-24 01:00 pmSSE 9.7 15.5----29.57-0.05 53.2 54.0 47.7---
2025-12-24 12:50 pm S 11.7 15.5----29.57- 53.1 54.0 47.3---
2025-12-24 12:40 pm S 9.7 15.5----29.58- 53.1 54.0 47.5---
2025-12-24 12:30 pmSSE 7.8 13.6----29.59- 52.9 54.0 47.5---
2025-12-24 12:20 pmSSE 5.8 9.7 9.2 118.3WNW29.59- 52.5 54.0 46.8---
2025-12-24 12:10 pmSSE 5.8 9.7----29.59- 52.3 54.0 46.4---
2025-12-24 12:00 pm SE 5.8 9.7----29.60+0.00 52.0 54.0 46.4---
2025-12-24 11:50 am SE 3.9 9.7 9.2 118.1 SW29.60- 51.8 54.0 46.4---
2025-12-24 11:40 am SE 5.8 9.7 9.2-8.1 SW29.61- 51.6 54.0 46.2---
2025-12-24 11:30 amESE 5.8 11.7----29.61- 51.4 54.0 46.4---
2025-12-24 11:20 amESE 5.8 9.7 9.2 118.1 W29.61- 51.3 54.0 46.4---
2025-12-24 11:10 amESE 7.8 11.7 9.2-8.1 W29.62- 51.1 54.0 46.4---
2025-12-24 11:00 amESE 9.7 13.6----29.62+0.05 51.1 54.0 46.6---
2025-12-24 10:50 am SE 9.7 17.5----29.62- 51.6 54.0 46.9---
2025-12-24 10:40 amSSE 13.6 17.5----29.63- 52.0 54.0 46.8---
2025-12-24 10:30 am S 13.6 17.5----29.62- 51.8 54.0 46.4---
2025-12-24 10:20 am S 13.6 17.5 9.2 128.3 NW29.62- 51.6 54.0 46.4---
2025-12-24 10:10 am S 13.6 19.4 9.2-8.3 NW29.62- 51.6 54.0 46.2---
2025-12-24 10:00 am S 13.6 17.5----29.62+0.06 51.4 54.0 46.0---
2025-12-24 09:50 am S 13.6 17.5 10.2 128.4 W29.61- 51.1 54.0 45.9---
2025-12-24 09:40 am S 11.7 15.5----29.60- 51.3 53.8 46.6---
2025-12-24 09:30 am S 9.7 15.5----29.60- 51.3 53.8 45.7---
2025-12-24 09:20 amSSE 7.8 11.7 9.2 128.1 W29.59- 50.9 53.8 43.9---
2025-12-24 09:10 am S 5.8 11.7----29.59- 50.7 53.8 43.7---
2025-12-24 09:00 amSSE 5.8 11.7----29.59+0.08 50.5 53.8 43.7---
2025-12-24 08:50 amSSE 5.8 11.7 10.5 128.2 W29.59- 50.4 53.8 43.9---
2025-12-24 08:40 amSSE 5.8 9.7----29.59- 50.2 53.8 43.5---
2025-12-24 08:30 am S 5.8 9.7----29.59- 50.2 53.8 43.9---
2025-12-24 08:20 am S 5.8 9.7 11.5 128.3 W29.59- 50.2 53.8 44.1---
2025-12-24 08:10 am S 5.8 9.7 11.5-8.3 W29.58- 50.4 53.8 44.4---
2025-12-24 08:00 am S 3.9 9.7----29.58+0.17 50.0 53.8 43.3---
2025-12-24 07:50 am S 3.9 7.8 11.8 128.3WSW29.57- 50.0 53.8 43.5---
2025-12-24 07:40 amSSE 3.9 9.7----29.57- 49.8 53.8 43.5---
2025-12-24 07:30 amESE 1.9 7.8----29.56- 49.8 54.0 43.5---
2025-12-24 07:20 am E 1.9 3.9 10.5 117.6WSW29.55- 49.8 54.0 43.3---
2025-12-24 07:10 am E 1.9 5.8 10.5-7.6WSW29.54- 49.8 54.0 43.5---
2025-12-24 07:00 am- 0.0 3.9----29.55+0.22 49.8 54.0 43.5---
2025-12-24 06:50 am- 0.0 3.9 11.5 127.7 W29.54- 49.8 54.0 43.3---
2025-12-24 06:40 am N 1.9 5.8----29.54- 49.8 54.0 43.2---
2025-12-24 06:30 am NW 3.9 7.8----29.54- 49.6 53.8 42.8---
2025-12-24 06:20 am NW 5.8 9.7 11.8 137.5 NW29.53- 49.6 54.0 43.3---
2025-12-24 06:10 amNNW 7.8 13.6 11.8-7.5 NW29.53- 49.6 53.8 43.3---
2025-12-24 06:00 am N 9.7 13.6----29.52+0.29 49.8 53.8 44.1---
2025-12-24 05:50 am N 11.7 15.5 13.8 137.8 NW29.49- 49.5 53.8 43.7---
2025-12-24 05:40 amNNW 13.6 19.4----29.49- 49.5 53.8 43.9---
2025-12-24 05:30 amNNW 17.5 23.3----29.48- 49.3 53.8 44.2---
2025-12-24 05:20 amNNW 15.5 21.4 13.5 117.4 W29.45- 49.3 53.8 45.3---
2025-12-24 05:10 amNNW 19.4 27.2----29.43- 48.7 54.0 44.2---
2025-12-24 05:00 am NW 21.4 29.1----29.41+0.23 48.9 54.0 45.0---
2025-12-24 04:50 am NW 23.3 31.1 13.8 117.4 SW29.39- 48.7 54.0 45.0---
2025-12-24 04:40 amWNW 25.3 33.0 13.8-7.4 SW29.38- 49.1 54.0 46.0---
2025-12-24 04:30 amWNW 25.3 33.0----29.38- 48.9 54.0 46.2---
2025-12-24 04:20 amWNW 27.2 35.0 14.4 137.7WNW29.36- 48.7 54.0 46.8---
2025-12-24 04:10 amWNW 27.2 36.9 14.4-7.7WNW29.33- 49.3 54.0 47.5---
2025-12-24 04:00 amWNW 23.3 33.0----29.33+0.12 50.2 54.0 48.4---
2025-12-24 03:50 amWNW 19.4 29.1----29.30- 51.8 53.8 49.6---
2025-12-24 03:40 amWSW 17.5 31.1----29.31- 54.1 53.6 51.4---
2025-12-24 03:30 am S 25.3 33.0----29.28- 55.8 53.6 53.1---
2025-12-24 03:20 am S 27.2 35.0 13.1 106.9 SW29.26- 56.1 53.6 53.2---
2025-12-24 03:10 am S 29.1 38.9 13.1-6.9 SW29.23- 56.3 53.6 53.8---
2025-12-24 03:00 am S 31.1 38.9----29.23-0.05 56.7 53.6 54.3---
2025-12-24 02:50 am S 31.1 38.9 16.7 107.2SSW29.21- 56.5 53.8 54.1---
2025-12-24 02:40 am S 33.0 42.7----29.20- 56.1 53.6 54.3---
2025-12-24 02:30 am S 36.9 44.7----29.20- 56.1 53.6 54.5---
2025-12-24 02:20 am S 36.9 50.5 17.1 97.5SSW29.20- 57.7 53.6 53.4---
2025-12-24 02:10 am S 40.8 52.4 17.1-7.5SSW29.19- 58.5 53.6 54.3---
2025-12-24 02:00 am S 35.0 46.6----29.18-0.10 59.5 53.6 54.3---
2025-12-24 01:50 amSSE 36.9 48.6 14.4 87.0SSW29.17- 60.6 53.6 54.1---
2025-12-24 01:40 amSSE 40.8 52.4----29.15- 59.2 53.8 54.9---
2025-12-24 01:30 amSSE 38.9 52.4----29.15- 59.5 53.8 54.9---
2025-12-24 01:20 amSSE 36.9 48.6 15.4 97.1SSW29.17- 59.4 53.8 54.5---
2025-12-24 01:10 amSSE 36.9 50.5 15.4-7.1SSW29.18- 58.3 53.8 54.7---
2025-12-24 01:00 amSSE 35.0 48.6------- 53.8----
2025-12-24 12:50 amSSE 35.0 46.6 12.8 96.9 SW29.22- 58.8 54.0 54.5---
2025-12-24 12:40 amSSE 35.0 46.6----29.23- 59.2 54.0 54.0---
2025-12-24 12:30 amSSE 31.1 40.8----29.24- 58.6 54.0 54.3---
2025-12-24 12:20 amSSE 29.1 42.7 13.1 137.1 NW29.26- 57.9 54.0 54.3---
2025-12-24 12:10 amSSE 27.2 38.9 13.1-7.1 NW29.27- 56.5 54.0 54.5---
2025-12-24 12:00 am S 23.3 29.1----29.28-0.14 55.8 54.1 54.1---
2025-12-23 11:50 pm S 25.3 33.0----29.28- 56.1 54.1 54.0---
2025-12-23 11:40 pm S 29.1 40.8----29.29- 56.7- 53.6---
2025-12-23 11:30 pmSSE 31.1 42.7----29.30- 57.2 54.1 53.8---
2025-12-23 11:20 pmSSE 33.0 46.6 11.2 126.9 NW29.29- 57.4 54.1 53.6---
2025-12-23 11:10 pmSSE 35.0 46.6 11.2-6.9 NW29.27- 57.7 54.1 53.6---
2025-12-23 11:00 pm SE 33.0 46.6----29.28-0.18 57.7 54.3 53.4---
2025-12-23 10:50 pm SE 21.4 36.9 10.8 138.4 NW29.31- 55.0- 52.0---
2025-12-23 10:40 pm E 13.6 25.3----29.34- 53.1 54.1 51.3---
2025-12-23 10:30 pm E 11.7 17.5----29.35- 52.5 54.3 51.4---
2025-12-23 10:20 pmENE 13.6 17.5 10.2 138.2 NW29.36- 51.4 54.3 50.9---
2025-12-23 10:10 pm NE 13.6 17.5 10.2-8.2 NW29.37- 51.1 54.3 50.5---
2025-12-23 10:00 pm NE 15.5 17.5----29.38-0.16 50.9 54.3 50.2---
2025-12-23 09:50 pmNNE 15.5 17.5 9.8 127.9 NW29.39- 50.7 54.3 50.2---

Wave Summary
for 46022 as of
(9:40 pm PST on 12/24/2025)
0540 GMT on 12/25/2025:

These wave data are displayed in rounded times.

     

Click on the graph icon in the table below to see a time series plot of the last five days of that observation.

5-day plot - Significant Wave Height Significant Wave Height (WVHT): 5.9 ft
5-day plot - Swell Height Swell Height (SwH): 5.2 ft
5-day plot - Swell Period Swell Period (SwP): 10.8 sec
5-day plot - Swell Direction Swell Direction (SwD):WNW
5-day plot - Wind Wave Height Wind Wave Height (WWH): 2.6 ft
5-day plot - Wind Wave Period Wind Wave Period (WWP): 5.3 sec
5-day plot - Wind Wave Direction Wind Wave Direction (WWD):SSW
5-day plot - Wave Steepness Wave Steepness (STEEPNESS): SWELL
5-day plot - Average Wave Period Average Wave Period (APD): 6.4 sec
Previous observations
TIME
(PST)
5-day plot - Wave Height
WVHT
ft
5-day plot - Swell Height
SwH
ft
5-day plot - Swell Period
SwP
sec
5-day plot - Swell Direction
SwD
 
5-day plot - Wind Wave Height
WWH
ft
5-day plot - Wind Wave Period
WWP
sec
5-day plot - Wind Wave Direction
WWD
 
5-day plot - Wave Steepness
STEEPNESS
 
5-day plot - Average Wave Period
APD
sec
2025-12-24 09:10 pm 6.9 5.9 11.4WNW 3.0 4.3 S SWELL 6.4
2025-12-24 08:40 pm 6.6 5.6 11.4WNW 3.0 5.6 WSW SWELL 6.6
2025-12-24 08:10 pm 6.9 6.6 12.1WNW 2.6 6.2 SW SWELL 7.0
2025-12-24 07:40 pm 6.9 6.6 10.8 W 2.6 5.9 WSW SWELL 7.3
2025-12-24 07:10 pm 8.9 8.9 11.4WNW 1.3 3.7 SSW SWELL 8.3
2025-12-24 06:40 pm 8.2 7.9 10.0WNW 1.3 3.6 SSW AVERAGE 7.7
2025-12-24 06:10 pm 9.2 9.2 10.8 W 1.6 3.7 SSW AVERAGE 8.2
2025-12-24 05:40 pm 9.2 9.2 10.8WSW 1.6 3.8 S AVERAGE 8.3
2025-12-24 05:10 pm 9.8 9.5 11.4WNW 2.0 4.2 SSW SWELL 8.2
2025-12-24 04:40 pm 10.2 10.2 10.8 W 2.3 3.8 SSW AVERAGE 8.3
2025-12-24 04:10 pm 10.5 10.5 11.4 W 2.0 4.0 SSW AVERAGE 8.3
2025-12-24 03:40 pm 9.8 9.8 10.8 SW 2.3 4.3 SSW AVERAGE 7.9
2025-12-24 03:10 pm 8.9 8.2 10.8WSW 3.0 5.3 SW AVERAGE 7.6
2025-12-24 02:40 pm 8.9 7.9 10.8 SW 3.9 4.3 SSW AVERAGE 7.5
2025-12-24 01:10 pm 9.8 9.5 11.4 W 2.3 5.3 WNW SWELL 8.3
2025-12-24 12:10 pm 9.2 9.2 11.4WNW 1.6 3.6 SSW SWELL 8.3
2025-12-24 11:40 am 9.2 8.9 11.4 SW 1.6 3.4 SSW SWELL 8.1
2025-12-24 11:10 am 9.2 8.9 11.4 W 1.6 3.0 S SWELL 8.1
2025-12-24 10:10 am 9.2 8.5 12.1 NW 3.3 5.9 NW SWELL 8.3
2025-12-24 09:40 am 10.2 9.8 12.1 W 2.6 4.2 NW SWELL 8.4
2025-12-24 09:10 am 9.2 8.9 12.1 W 1.6 4.0 NNW SWELL 8.1
2025-12-24 08:40 am 10.5 10.2 12.1 W 1.6 3.8 NW SWELL 8.2
2025-12-24 08:10 am 11.5 11.5 12.1 W 1.6 3.7 NW SWELL 8.3
2025-12-24 07:40 am 11.8 11.8 12.1WSW 2.0 3.8 WNW SWELL 8.3
2025-12-24 07:10 am 10.5 10.2 11.4WSW 2.0 3.7 WNW AVERAGE 7.6
2025-12-24 06:40 am 11.5 11.2 12.1 W 2.0 4.0 WNW SWELL 7.7
2025-12-24 06:10 am 11.8 11.5 12.9 NW 2.3 3.7 NW SWELL 7.5
2025-12-24 05:40 am 13.8 12.5 12.9 NW 6.2 5.6 W SWELL 7.8
2025-12-24 05:10 am 13.5 9.2 11.4 W 9.8 7.7 W AVERAGE 7.4
2025-12-24 04:40 am 13.8 9.5 11.4 SW 9.8 7.7 WNW AVERAGE 7.4
2025-12-24 04:10 am 14.4 10.8 12.9WNW 9.2 8.3 WSW SWELL 7.7
2025-12-24 03:10 am 13.1 9.8 10.0 SW 8.9 7.1 SW STEEP 6.9
2025-12-24 02:40 am 16.7 7.2 12.9WNW 15.4 10.0 SSW STEEP 7.2
2025-12-24 02:10 am 17.1 4.9 12.9 NW 16.4 9.1 SSW STEEP 7.5
2025-12-24 01:40 am 14.4 6.2 13.8WNW 13.1 8.3 SSWVERY_STEEP 7.0
2025-12-24 01:10 am 15.4 6.6 13.8WNW 13.8 9.1 SSW STEEP 7.1
2025-12-24 12:40 am 12.8 8.2 9.1 SW 9.5 6.7 S STEEP 6.9
2025-12-24 12:10 am 13.1 8.2 12.9 NW 10.2 8.3 SSW AVERAGE 7.1
2025-12-23 11:10 pm 11.2 9.2 12.1 NW 6.6 6.7 SSW SWELL 6.9
2025-12-23 10:40 pm 10.8 9.8 12.9 NW 4.3 5.0 N SWELL 8.4
2025-12-23 10:10 pm 10.2 9.2 12.9 NW 3.9 5.0 N SWELL 8.2

Plot icon Plot of wave energy versus frequency (and period)