Station 46085 (LLNR 984.15) - CENTRAL GULF OF ALASKA - 265NM West of Cape Ommaney, AK Image indicating link to RSS feed of recent meteorological observations for station 46085


Conditions at 46085 as of
(3:10 pm AKDT)
2310 GMT on 06/08/2026:
     

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):NNW ( 330 deg true )
5-day plot - Wind Speed Wind Speed (WSPD): 3.9 kts
5-day plot - Wind Gust Wind Gust (GST): 5.8 kts
5-day plot - Atmospheric Pressure Atmospheric Pressure (PRES):29.65 in
5-day plot - Air Temperature Air Temperature (ATMP): 46.8 °F
5-day plot - Dew Point Dew Point (DEWP): 45.9 °F
5-day plot - Wind Chill Wind Chill (CHILL): 44.8 °F
5-day plot - Wind Speed at 10 Meters Wind Speed at 10 meters (WSPD10M): 3.9 kts
5-day plot - Wind Speed at 20 Meters Wind Speed at 20 meters (WSPD20M): 3.9 kts
5-day plot -  Wind Speed, Wind Gust and Atmospheric Pressure Combined plot of Wind Speed, Gust, and Air Pressure
Supplemental Measurements
Lowest 1-minute Pressure
Time (AKDT)Pressure
3:10 pm29.64 in
Highest 1-minute Wind Speed
Time (AKDT)5-day plot - 1-Minute Wind Speed WSPD 5-day plot - 1-Minute Wind Direction WDIR
3:02 pm 3.9 kts NW ( 320 deg true )
Previous observations
TIME
(AKDT)
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
2026-06-08 03:00 pm NW 3.9 5.8----29.64+0.04 46.6- 45.7---
2026-06-08 02:50 pmNNW 3.9 5.8 4.9 96.8 SW29.64- 46.8- 45.9---
2026-06-08 02:40 pm NW 5.8 5.8----29.64- 46.8- 45.9---
2026-06-08 02:30 pm NW 3.9 5.8----29.63- 46.9- 45.9---
2026-06-08 02:20 pmNNW 3.9 5.8 5.2 76.7 SE29.63- 46.9- 45.9---
2026-06-08 02:10 pm NW 5.8 7.8 5.2-6.7 SE29.63- 46.8- 45.9---
2026-06-08 02:00 pmNNW 5.8 5.8----29.62+0.03 46.8- 45.9---
2026-06-08 01:50 pmNNW 5.8 5.8 4.9 86.7 SW29.62- 46.8- 45.9---
2026-06-08 01:40 pmNNW 5.8 7.8 4.9-6.7 SW29.62- 46.9- 45.9---
2026-06-08 01:30 pm N 5.8 5.8----29.62- 47.1- 45.7---
2026-06-08 01:20 pm N 3.9 5.8 5.2 86.8 SW29.62- 47.1- 45.5---
2026-06-08 01:10 pm N 1.9 3.9 5.2-6.8 SW29.62- 47.3- 45.7---
2026-06-08 01:00 pm N 1.9 3.9----29.62+0.04 47.1- 45.7---
2026-06-08 12:50 pm N 3.9 5.8 5.6 166.9 SW29.62- 47.1- 45.9---
2026-06-08 12:40 pm N 3.9 5.8 5.6-6.9 SW29.62- 47.1- 45.9---
2026-06-08 12:30 pm N 3.9 5.8----29.62- 46.9- 45.7---
2026-06-08 12:20 pmNNW 5.8 7.8 5.2 86.8 SW29.61- 46.9- 45.9---
2026-06-08 12:10 pm N 5.8 7.8 5.2-6.8 SW29.61- 46.9- 45.9---
2026-06-08 12:00 pm N 5.8 7.8----29.60+0.03 46.9- 46.0---
2026-06-08 11:50 am N 3.9 5.8 5.6 86.8 SW29.60- 46.8- 45.9---
2026-06-08 11:40 am N 3.9 5.8----29.60- 46.8- 45.9---
2026-06-08 11:30 am N 3.9 5.8----29.60- 46.8- 46.2---
2026-06-08 11:20 am N 3.9 5.8 5.6 86.9 SW29.59- 46.6- 45.9---
2026-06-08 11:10 amNNE 3.9 5.8 5.6-6.9 SW29.59- 46.6- 46.0---
2026-06-08 11:00 amNNE 3.9 5.8----29.59+0.02 46.6- 46.0---
2026-06-08 10:50 amNNE 3.9 5.8 5.2 86.8SSW29.59- 46.6- 46.0---
2026-06-08 10:40 amNNE 3.9 5.8 5.2-6.8SSW29.59- 46.6- 46.0---
2026-06-08 10:30 amNNE 3.9 5.8----29.59- 46.8- 46.2---
2026-06-08 10:20 am NE 3.9 5.8 5.6 86.8 SW29.59- 46.8- 46.0---
2026-06-08 10:10 am NE 3.9 5.8 5.6-6.8 SW29.59- 46.8- 46.2---
2026-06-08 10:00 am NE 3.9 7.8----29.58+0.01 46.8- 46.2---
2026-06-08 09:50 am NE 3.9 5.8 5.6 86.8 SW29.58- 46.8- 46.2---
2026-06-08 09:40 am NE 3.9 5.8 5.6-6.8 SW29.58- 46.8- 46.2---
2026-06-08 09:30 am NE 3.9 5.8----29.58- 46.8- 46.2---
2026-06-08 09:20 amENE 3.9 5.8 5.6 86.9 SW29.58- 46.8- 46.4---
2026-06-08 09:10 am E 3.9 5.8 5.6-6.9 SW29.58- 46.8- 46.6---
2026-06-08 09:00 am E 1.9 3.9----29.58+0.01 46.6- 46.4---
2026-06-08 08:50 am E 3.9 3.9 5.6 86.8 SW29.57- 46.6- 46.4---
2026-06-08 08:40 amENE 3.9 5.8 5.6-6.8 SW29.58- 46.4- 46.4---
2026-06-08 08:30 amENE 3.9 5.8----29.57- 46.4- 46.4---
2026-06-08 08:20 amENE 5.8 7.8 5.6 86.8 SW29.58- 46.2- 46.2---
2026-06-08 08:10 amENE 5.8 7.8 5.6-6.8 SW29.57- 46.2- 46.2---
2026-06-08 08:00 am E 5.8 7.8----29.57+0.01 46.0- 46.0---
2026-06-08 07:50 am E 5.8 7.8 5.9 87.0 SW29.57- 46.0- 46.0---
2026-06-08 07:40 am E 5.8 7.8----29.57- 46.0- 46.0---
2026-06-08 07:30 am E 5.8 7.8----29.57- 45.9- 45.9---
2026-06-08 07:20 am E 5.8 7.8 5.9 87.0 SW29.57- 46.0- 46.0---
2026-06-08 07:10 am E 5.8 7.8 5.9-7.0 SW29.57- 45.9- 45.9---
2026-06-08 07:00 am E 5.8 7.8----29.57+0.01 45.9- 45.9---
2026-06-08 06:50 amENE 5.8 7.8 6.2 86.9 SW29.57- 45.9- 45.9---
2026-06-08 06:40 am E 5.8 7.8 6.2-6.9 SW29.56- 45.7- 45.7---
2026-06-08 06:30 amENE 5.8 7.8----29.56- 45.7- 45.7---
2026-06-08 06:20 amENE 7.8 9.7 5.6 76.9SSW29.56- 45.7- 45.7---
2026-06-08 06:10 amENE 5.8 9.7 5.6-6.9SSW29.56- 45.7- 45.7---
2026-06-08 06:00 amENE 5.8 9.7----29.56+0.00 45.7- 45.7---
2026-06-08 05:50 am E 5.8 7.8 5.6 86.8SSW29.56- 45.7- 45.7---
2026-06-08 05:40 am E 5.8 7.8----29.56- 45.7- 45.7---
2026-06-08 05:30 am E 5.8 7.8----29.56- 45.7- 45.7---
2026-06-08 05:20 am E 5.8 7.8 5.6 86.9SSW29.56- 45.7- 45.7---
2026-06-08 05:10 am E 5.8 7.8 5.6-6.9SSW29.56- 45.5- 45.5---
2026-06-08 05:00 am E 3.9 5.8----29.56+0.00 45.5- 45.5---
2026-06-08 04:50 am E 3.9 5.8 5.2 76.8SSW29.56- 45.3- 45.3---
2026-06-08 04:40 amENE 5.8 5.8 5.2-6.8SSW29.56- 45.3- 45.3---
2026-06-08 04:30 am E 5.8 7.8----29.56- 45.3- 45.3---
2026-06-08 04:20 amENE 5.8 7.8 4.9 76.5 SW29.56- 45.3- 45.3---
2026-06-08 04:10 am E 3.9 5.8 4.9-6.5 SW29.56- 45.3- 45.3---
2026-06-08 04:00 am E 3.9 7.8----29.56+0.00 45.3- 45.3---
2026-06-08 03:50 am E 5.8 7.8 5.2 76.7SSW29.56- 45.3- 45.3---
2026-06-08 03:40 am E 3.9 5.8 5.2-6.7SSW29.56- 45.3- 45.3---
2026-06-08 03:30 am E 3.9 5.8----29.56- 45.3- 45.3---
2026-06-08 03:20 am E 5.8 7.8 4.9 166.6 SW29.56- 45.3- 45.3---
2026-06-08 03:10 am E 7.8 7.8 4.9-6.6 SW29.56- 45.5- 45.5---
2026-06-08 03:00 am E 7.8 7.8----29.56+0.00 45.7- 45.7---
2026-06-08 02:50 am E 5.8 7.8 5.2 76.4SSW29.56- 45.9- 45.9---
2026-06-08 02:40 am E 5.8 7.8----29.56- 45.7- 45.7---
2026-06-08 02:30 am E 3.9 5.8----29.56- 45.9- 45.9---
2026-06-08 02:20 amESE 3.9 5.8 5.6 166.8 SW29.56- 45.7- 45.7---
2026-06-08 02:10 amESE 3.9 5.8 5.6-6.8 SW29.56- 45.9- 45.9---
2026-06-08 02:00 am E 3.9 3.9----29.56+0.00 45.9- 45.9---
2026-06-08 01:50 amESE 3.9 5.8 4.9 166.6SSW29.56- 45.7- 45.7---
2026-06-08 01:40 am E 3.9 5.8----29.56- 45.9- 45.9---
2026-06-08 01:30 amESE 3.9 5.8----29.56- 45.9- 45.9---
2026-06-08 01:20 amESE 3.9 5.8 4.9 166.5SSW29.56- 45.9- 45.7---
2026-06-08 01:10 amESE 5.8 5.8 4.9-6.5SSW29.56- 45.9- 45.7---
2026-06-08 01:00 amESE 3.9 5.8----29.56+0.02 45.9- 45.7---
2026-06-08 12:50 am SE 3.9 5.8 5.2 166.3SSW29.56- 45.9- 45.5---
2026-06-08 12:40 amESE 5.8 5.8 5.2-6.3SSW29.56- 45.9- 45.5---
2026-06-08 12:30 amESE 5.8 5.8----29.56- 45.9- 45.3---
2026-06-08 12:20 amESE 3.9 5.8 5.2 76.5 S29.56- 45.7- 45.1---
2026-06-08 12:10 amESE 3.9 5.8----29.56- 45.7- 45.1---
2026-06-08 12:00 am SE 5.8 7.8----29.56+0.02 45.9- 45.5---
2026-06-07 11:50 pmESE 5.8 5.8 5.6 166.4 S29.56- 45.9- 45.3---
2026-06-07 11:40 pmESE 5.8 7.8----29.56- 45.9- 45.3---
2026-06-07 11:30 pm SE 3.9 5.8----29.56- 45.9- 45.3---
2026-06-07 11:20 pm SE 3.9 3.9 4.9 76.0 S29.56- 45.9- 45.3---
2026-06-07 11:10 pm SE 3.9 5.8 4.9-6.0 S29.55- 45.9- 45.3---
2026-06-07 11:00 pmSSE 5.8 7.8----29.55+0.03 45.7- 45.1---
2026-06-07 10:50 pmSSE 5.8 7.8 4.9 166.0SSW29.55- 45.7- 45.1---
2026-06-07 10:40 pmSSE 5.8 5.8 4.9-6.0SSW29.55- 45.5- 45.0---
2026-06-07 10:30 pm SE 5.8 7.8----29.55- 45.7- 45.3---
2026-06-07 10:20 pmSSE 5.8 7.8 4.9 75.9 S29.54- 45.5- 45.3---
2026-06-07 10:10 pmSSE 5.8 7.8 4.9-5.9 S29.54- 45.5- 45.3---
2026-06-07 10:00 pm S 5.8 7.8----29.54+0.03 45.5- 45.3---
2026-06-07 09:50 pmSSE 7.8 9.7 4.9 166.0 S29.54- 45.7- 45.5---
2026-06-07 09:40 pm- 5.8 7.8 4.9-6.0 S29.54-------
2026-06-07 09:30 pmSSE 5.8 9.7----29.54- 45.7- 45.7---
2026-06-07 09:20 pmSSE 5.8 7.8 5.2 76.3 S29.54- 45.7- 45.7---
2026-06-07 09:10 pmSSE 5.8 7.8 5.2-6.3 S29.54- 45.7- 45.7---
2026-06-07 09:00 pmSSE 5.8 7.8----29.54+0.03 45.5- 45.5---
2026-06-07 08:50 pm SE 5.8 7.8 5.2 76.1 S29.54- 45.3- 45.3---
2026-06-07 08:40 pmSSE 7.8 9.7----29.54- 45.3- 45.3---
2026-06-07 08:30 pmSSE 5.8 9.7----29.53- 45.5- 45.5---
2026-06-07 08:20 pm S 5.8 7.8 5.6 76.1 S29.53- 45.7- 45.7---
2026-06-07 08:10 pm S 7.8 9.7----29.53- 45.7- 45.5---
2026-06-07 08:00 pm S 7.8 9.7----29.52+0.00 45.5- 45.3---
2026-06-07 07:50 pm S 7.8 11.7 5.6 166.2 S29.52- 45.7- 45.5---
2026-06-07 07:40 pm S 7.8 11.7 5.6-6.2 S29.52- 45.7- 45.5---
2026-06-07 07:30 pmSSE 7.8 9.7----29.52- 45.9- 45.7---
2026-06-07 07:20 pm S 7.8 11.7 5.9 76.3 S29.52- 46.0- 45.9---
2026-06-07 07:10 pm S 7.8 13.6 5.9-6.3 S29.52- 46.2- 45.7---
2026-06-07 07:00 pm S 9.7 11.7----29.52+0.00 46.2- 45.7---
2026-06-07 06:50 pm S 7.8 11.7 5.9 76.3SSE29.52- 46.2- 45.7---
2026-06-07 06:40 pm S 7.8 9.7----29.52- 46.4- 46.4---
2026-06-07 06:30 pm S 7.8 9.7----29.52- 46.4- 46.4---
2026-06-07 06:20 pm S 7.8 9.7 5.6 166.4 S29.52- 46.2- 46.2---
2026-06-07 06:10 pm S 9.7 11.7 5.6-6.4 S29.52- 46.2- 46.2---
2026-06-07 06:00 pm S 7.8 11.7----29.52+0.00 46.4- 46.4---
2026-06-07 05:50 pm S 7.8 9.7 5.6 166.3 S29.52- 46.4- 46.2---
2026-06-07 05:40 pm S 9.7 11.7 5.6-6.3 S29.52- 46.4- 46.0---
2026-06-07 05:30 pm S 9.7 11.7----29.52- 46.4- 46.0---
2026-06-07 05:20 pm S 9.7 11.7 5.9 76.2SSE29.52- 46.6- 46.4---
2026-06-07 05:10 pm S 7.8 11.7 5.9-6.2SSE29.52- 46.6- 46.2---
2026-06-07 05:00 pm S 9.7 11.7----29.52+0.02 46.4- 46.0---
2026-06-07 04:50 pm S 7.8 11.7 5.6 76.1 S29.52- 46.4- 46.2---
2026-06-07 04:40 pm S 7.8 9.7----29.52- 46.4- 46.4---
2026-06-07 04:30 pm S 7.8 11.7----29.52- 46.4- 46.4---
2026-06-07 04:20 pm S 9.7 11.7 5.9 166.4SSW29.52- 46.4- 46.2---
2026-06-07 04:10 pm S 9.7 11.7 5.9-6.4SSW29.52- 46.4- 46.0---
2026-06-07 04:00 pm S 9.7 11.7----29.52+0.02 46.2- 46.0---
2026-06-07 03:50 pm S 9.7 11.7 5.9 76.2SSE29.52- 45.9- 45.9---
2026-06-07 03:40 pm S 9.7 11.7 5.9-6.2SSE29.52- 45.9- 45.9---
2026-06-07 03:10 pm S 9.7 13.6 5.9-6.2SSW29.51- 46.0- 46.0---
2026-06-07 03:00 pm S 9.7 13.6----29.51+0.02 46.0- 46.0---
2026-06-07 02:50 pm S 9.7 11.7 5.9 166.5SSW29.51- 46.0- 46.0---

Wave Summary
for 46085 as of (2:40 pm AKDT)
2240 GMT on 06/08/2026:

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): 4.9 ft
5-day plot - Swell Height Swell Height (SwH): 4.6 ft
5-day plot - Swell Period Swell Period (SwP): 9.1 sec
5-day plot - Swell Direction Swell Direction (SwD): SW
5-day plot - Wind Wave Height Wind Wave Height (WWH): 1.0 ft
5-day plot - Wind Wave Period Wind Wave Period (WWP): 3.7 sec
5-day plot - Wind Wave Direction Wind Wave Direction (WWD):ESE
5-day plot - Wave Steepness Wave Steepness (STEEPNESS): SWELL
5-day plot - Average Wave Period Average Wave Period (APD): 6.8 sec
Previous observations
TIME
(AKDT)
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
2026-06-08 02:10 pm 5.2 4.9 6.7 SE 1.0 4.0 SE STEEP 6.7
2026-06-08 01:40 pm 4.9 4.9 7.7 SW 1.0 3.2 ESE AVERAGE 6.7
2026-06-08 01:10 pm 5.2 4.9 7.7 SW 1.0 4.0 SSE AVERAGE 6.8
2026-06-08 12:40 pm 5.6 5.2 16.0 SW 1.0 4.0 ESE SWELL 6.9
2026-06-08 12:10 pm 5.2 5.2 7.7 SW 1.0 4.0 SE AVERAGE 6.8
2026-06-08 11:40 am 5.6 5.6 7.7 SW 1.0 3.4 SE STEEP 6.8
2026-06-08 11:10 am 5.6 5.2 7.7 SW 1.0 3.7 ESE AVERAGE 6.9
2026-06-08 10:40 am 5.2 4.9 7.7SSW 1.0 4.0 SE AVERAGE 6.8
2026-06-08 10:10 am 5.6 5.6 8.3 SW 1.0 3.7 ESE AVERAGE 6.8
2026-06-08 09:40 am 5.6 5.2 8.3 SW 1.0 3.6 SE AVERAGE 6.8
2026-06-08 09:10 am 5.6 5.6 8.3 SW 1.0 3.8 SSE AVERAGE 6.9
2026-06-08 08:40 am 5.6 5.6 7.7 SW 1.0 4.0 SE STEEP 6.8
2026-06-08 08:10 am 5.6 5.6 8.3 SW 1.0 3.6 SSE AVERAGE 6.8
2026-06-08 07:40 am 5.9 5.9 7.7 SW 1.0 3.8 SE STEEP 7.0
2026-06-08 07:10 am 5.9 5.6 8.3 SW 1.0 3.7 S AVERAGE 7.0
2026-06-08 06:40 am 6.2 6.2 7.7 SW 1.0 4.0 SSE STEEP 6.9
2026-06-08 06:10 am 5.6 5.2 6.7SSW 1.0 4.0 S STEEP 6.9
2026-06-08 05:40 am 5.6 5.6 7.7SSW 1.0 4.0 S STEEP 6.8
2026-06-08 05:10 am 5.6 5.2 7.7SSW 1.0 3.7 SSE AVERAGE 6.9
2026-06-08 04:40 am 5.2 5.2 7.1SSW 1.0 3.8 SSE STEEP 6.8
2026-06-08 04:10 am 4.9 4.6 7.1 SW 1.0 3.2 S STEEP 6.5
2026-06-08 03:40 am 5.2 5.2 7.1SSW 1.0 3.7 SSE STEEP 6.7
2026-06-08 03:10 am 4.9 4.9 16.0 SW 1.0 3.8 SE SWELL 6.6
2026-06-08 02:40 am 5.2 4.9 7.1SSW 1.3 3.8 SSE STEEP 6.4
2026-06-08 02:10 am 5.6 5.6 16.0 SW 1.0 4.0 SSE SWELL 6.8
2026-06-08 01:40 am 4.9 4.9 16.0SSW 1.3 3.8 SE SWELL 6.6
2026-06-08 01:10 am 4.9 4.9 16.0SSW 1.3 4.0 SSE SWELL 6.5
2026-06-08 12:40 am 5.2 4.9 16.0SSW 1.3 3.2 SSE SWELL 6.3
2026-06-08 12:10 am 5.2 5.2 7.1 S 1.3 3.8 SE STEEP 6.5
2026-06-07 11:40 pm 5.6 5.2 16.0 S 1.3 3.6 SSE SWELL 6.4
2026-06-07 11:10 pm 4.9 4.6 7.1 S 1.3 4.0 SSE STEEP 6.0
2026-06-07 10:40 pm 4.9 4.6 16.0SSW 1.3 4.0 SSE SWELL 6.0
2026-06-07 10:10 pm 4.9 4.6 7.1 S 1.6 4.0 SSE STEEP 5.9
2026-06-07 09:40 pm 4.9 4.6 16.0 S 1.6 3.7 S SWELL 6.0
2026-06-07 09:10 pm 5.2 5.2 7.1 S 1.3 3.7 SE STEEP 6.3
2026-06-07 08:40 pm 5.2 4.9 7.1 S 1.6 4.0 SSE STEEP 6.1
2026-06-07 08:10 pm 5.6 5.2 7.1 S 1.6 3.6 S STEEP 6.1
2026-06-07 07:40 pm 5.6 5.6 16.0 S 1.6 3.7 SSE SWELL 6.2
2026-06-07 07:10 pm 5.9 5.6 7.1 S 1.6 3.4 SSE STEEP 6.3
2026-06-07 06:40 pm 5.9 5.6 6.7SSE 1.3 3.7 SSE STEEP 6.3
2026-06-07 06:10 pm 5.6 5.2 16.0 S 2.0 4.2 SSE SWELL 6.4
2026-06-07 05:40 pm 5.6 5.2 16.0 S 1.6 4.3 SSE SWELL 6.3
2026-06-07 05:10 pm 5.9 5.6 6.7SSE 1.6 3.3 SSE STEEP 6.2
2026-06-07 04:40 pm 5.6 5.2 7.1 S 1.3 3.4 S STEEP 6.1
2026-06-07 04:10 pm 5.9 5.6 16.0SSW 2.3 3.8 SE SWELL 6.4
2026-06-07 03:40 pm 5.9 5.6 7.1SSE 2.0 3.7 SSE STEEP 6.2
2026-06-07 03:10 pm 5.9 5.2 16.0SSW 2.3 4.5 SE SWELL 6.2

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