01 Aut/95 SOLAR EVENT LISTS This directory contains daily preliminary lists of solar events. The solar event reports that are received at SEL throughout the day are edited by the duty forecaster to remove incomplete and duplicate reports. This list contains one line for each event observed. The list is written into this directory after the end of the day, usually near 0400 UT on the next day. A subset of each list (the "energetic" events) is included in the daily "Solar Geophysical Activity Summary (SGAS)" report and the "Energetic Events" list in SEL's WEEKLY publication. This sample list shows typical event reports. The format is fixed, 80 columns wide, with standard headers. The fields are described below. If no events are reported the following line is shown: No solar event reports received. Sample Report ******************************************************************************** Prepared by the U.S. Dept. of Commerce, NOAA, Space Environment Laboratory 0405 UT 24 Jun 1995 EDITED EVENTS for 23 Jun 95 Event Begin Max End Obs Q Type Loc/Frq Particulars Reg# 8880 + 0024 //// 0025 CUL C RSP 018-260 III/2 8890 0028 //// 0028 CUL C RSP 018-030 III/1 8900 + 0550 //// 0551 CUL C RSP 020-080 III/1 8910 0700 //// 0701 SVI U RSP 037-062 III/2 8920 + 1251 1253 1253 SVI G RBR 245 100 8920 + 1251 //// 1254 SAG C RSP 030-080 III/2 8930 1309 //// 1310 SVI U RSP 035-065 III/2 8940 + 1358 //// 1403 SAG C RSP 030-060 III/1 8950 + 1417 1421 1424 GO8 5 XRA 1-8A B2.7 7.01E-05 7882 8950 + 1420 1421 1428 SVI 3 FLA N07E12 SF ERU 7882 8960 + 1657 1703 1716 GO8 5 XRA 1-8A B1.9 1.66E-04 7882 8960 + 1701 1703 1707 HOL 3 FLA N04E14 SF 7882 8970 + 1728 1732 1735 GO8 5 XRA 1-8A B2.8 9.22E-05 7882 8970 1731 1732 1741 HOL 3 FLA N04E13 SF 7882 8980 + 1810 1818 1822 GO8 5 XRA 1-8A B1.7 9.95E-05 7882 8980 1818 1820 1824 RAM 3 FLA N04E11 SF ERU 7882 8990 1832 1844 1848 GO8 5 XRA 1-8A B1.2 1.15E-04 ******************************************************************************** The second line of the list indicates the date/time the list was created. This is usually near 0400 UT the next day; otoherwise it indicates only that the program was rerun for some reason. EDITED EVENTS for "date" - the UT date of the event reports (only one UT day per list). Event - This is an arbitrary event number assigned by SEL. It groups several reports into a single event, as determined by the SEL forecaster. + - A plus sign (+) after the event number indicates that more than one report was received for this event, and the forecaster has selected this report to represent those received. Begin, Max, End - The UT Time (UT) of the beginning, maximum, and end of the event as reported by the observing site. "////" indicates a missing time. The UT day of the event's begin time is the UT day of the list. The UT day of the maximum and/or end times may or may not be the same as the begin time. Most solar events are several hours in duration. If the maximum or end time is less than the begin time, then assume the times are for the next UT day. The begin time of an x-ray event is defined as the first minute, in a sequence of 4 minutes, of steep monotonic increase in 0.1-0.8 nm flux. The x-ray event maximum is taken as the minute of the peak x-ray flux. The end time is the time when the flux level decays to a point halfway between the maximum flux and the pre-flare background level. Obs - The reporting observatory. CUL - Culgoora, Australia GO7, GO8, GO9 - GOES 7, 8, or 9 satellites HOL - Holloman AFB, NM, USA LEA - Learmonth, Australia PAL - Palahua, HI, USA RAM - Ramey AFB, PR, USA SAG - Sagamore Hill, PA, USA SVI - San Vito, Italy (See the "Station Lists" directory in the "Welcome" directory for more information.) Q - Quality For radio bursts at fixed and sweep frequencies, and for storms, this shows the quality of the data C = Corrected report G = Good U = Uncertain For optical flares, this shows the quality of observing conditions, from 1 to 5, where: 1 = very poor and 5 = excellent X-ray events have a quality of 5 (meaning excellent). Type - Type of report, (see the Glossary in the "Welcome" directory for definitions). BSL = Bright surge on the limb DSF = Filament disappearance EPL = Eruptive prominence on the limb FIL = Filament FLA = Optical flare observed in H-alpha FOR = Forbush decrease (cosmic ray decrease)) GLE = Ground-level event (cosmic ray increase) LPS = Loop prominence system PCA = Polar cap absorption RBR = Fixed-frequency radio burst RNS = Radio Noise Storm RSP = Sweep-frequency radio burst XRA = X-ray flare Loc/Frq - Location or frequency. Location is in degrees latitude, north or south, and degrees longitude, east or west, from central meridian. The location is the spherical, heliographic coordinates of the solar region, as a distance in degrees from a line extending from the solar equator (heliographic latitude), and distance in degrees from a line extending from the north solar rotational pole to the south solar rotational pole through the center of the solar disk, as viewed from Earth (central meridian) in H-alpha. Frequencies are in Mhz. Particulars - Additional information from the report, chosen on the basis of the report type. XRA: X-ray Class Class x = peak flux in the 0.1 to 0.8 nm range In mks system In cgs system Wm-2 cm-2 s-1 A < x 10-7 x 10-4 B 10-7 <= x 10-6 10-4 <= x 10-3 C 10-6 <= x 10-6 10-3 <= x 10-2 M 10-5 <= x 10-6 10-2 <= x 10-1 X 10-4 <= x 10-1 <= x Integrated flux from start to end, in joules m E-2. FLA: Importance and brightness Importance is the corrected area of the flare in heliospheric square degrees at maximum brightness, observed in the H-alpha line (656.3 nm). S - Subflare (area < or =2.0 square degrees). 1 - Importance 1 ( 2.1 <= area <= 5.1 square degrees) 2 - Importance 2 ( 5.2 <= area <= 12.4 square degrees) 3 - Importance 3 (12.5 <= area <= 24.7 square degrees) 4 - Importance 4 ( area >= 24.8 square degrees) Brightness is the relative maximum brightness of flare in H-alpha. F - faint N - normal B - brilliant Other comments: ERU - Eruptive RBR: The peak value above pre-burst background of associated radio bursts at frequencies of 245 and 2695 MHz: 1 flux unit = 10-22 Wm-2 Hz-1 RSP: The intensity is a relative scale from 1 (low) to 3 (high) of any sweep radio event associated with the energetic event, as follows Type II: Slow drift burst Type III: Fast drift burst Type IV: Broadband smooth continuum burst Type V: Brief continuum burst, generally associated with Type III bursts Type CTM: Long-lived dekametric continuum associated with storms of Type IV bursts Reg# - The SEL-assigned solar region number. The daily SEL Solar Region Summary report contains detailed information about solar regions.