On the left side it is reported the latest ursigram (USSPS) describing the main characteristics of the SunSPotS groups observed in photosphere. All the information about the sunspot groups are reported in the ursigram with the following format:

USSPS 31405 JJHHH aaabc ddeee QXXYY fghii

where:

- JJ = Catania date of observation

- HHH = hours and tenths of hours (UT)

- aaa = Wolf number

- b = seeing quality (1=very poor, 5=exceptional)

- c = solar disk dimension (2 for Catania drawing)

- dd = Catania serial number of sunspot group

- eee = area of sunspot group in tens of millionths of the solar hemisphere

- Q = quadrant (heliographic coordinate) in which geometric center of sunspot group is located:

• 1 = NE
• 2 = SE
• 3 = SW
• 4 = NW

- XX = distance to central meridian in degrees

- YY = heliographic latitude in degrees

- f = type of penumbra

- g = relative importance of leading spot and density of the sunspot population

- h = Zurich sunspot class

- ii = number of spots in the group

On the right side it is shown the corresponding drawing in jpeg2000 format. Click on the image for a larger display. The latest USSPS from Catania in a .txt format can be also downloaded clicking on "download".