Sillok Metrics
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Sky and weathershare

Solar-eclipse articles matched by computation

Articles mentioning '日食' are classified by type (observation report, forecast, rescue ritual, non-occurrence, discussion); the metric is the share whose date lies within ±1 day of a computed eclipse visible from Seoul.

65.5%of 84 observation reports match a Seoul eclipse
Key point

Answers the question 'Can the Sillok's eclipse records be trusted?' type by type: 65% of observation reports match an eclipse visible from Seoul and 95% an eclipse somewhere on Earth; most of the rest are eclipses after sunset that were recorded from calculation. Counting every '日食' article as an observation drops the rate to 24%, so never use the total that ignores type.

Formula
Per type: matched / articles of that type. Eclipses computed from DE406 at every new moon, testing whether Sun and Moon overlap above the Seoul horizon. The ±1-day window matches the calendar conversion uncertainty; the ±0 value is given too.
How to read it
The match rate of observation reports is the site's headline number. Forecast and ritual articles include eclipses that were never visible (below the horizon or elsewhere), so lower rates there are expected.
Caveats
Types were coded article by article (codebook published), with precision and its 95% interval on the reliability card. Ahn & Lee (2004) counted events; this site counts articles, so the totals differ.
External check
Ahn & Lee (2004) Table 1: 231 Sillok eclipse records, 11 mis-dated, 60 not visible.
Reliability card
externalExternal match — compared with an astronomical computation

Of 84 observation-report articles, 55 fall within ±1 day of a computed eclipse visible from Seoul = 65.5% (Wilson 95% 54.8%–74.8%); 95.2% (80) match an eclipse somewhere on Earth (Espenak–Meeus canon).

Classification by type: all 332 articles were coded by four coders; 34 were blind re-coded by another coder — agreement 91.2%, κ = 0.89 (κ = 0.94 when pooled into observation / not an eclipse / other).

0%20%40%60%80%100%Observation report (n=84)observation report (n=84): 65%Rescue ritual (n=8)rescue ritual (n=8): 88%Did not occur / cloud (n=8)did not occur / cloud (n=8): 63%Forecast / computation (n=39)forecast / computation (n=39): 15%Discussion / retrospect (n=138)discussion / retrospect (n=138): 3%Not an eclipse (n=45)not an eclipse (n=45): 0%All (n=322)all (n=322): 24%
Match rate by type (eclipse visible from Seoul, ±1 day) with Wilson 95% intervals. Observation reports are the headline.
TypeWindowCountMatchedShare95% lo95% hi
discussion / retrospecteclipse visible from Seoul, same day13800.0%0.0%2.7%
discussion / retrospecteclipse visible from Seoul, ±1 day13842.9%1.1%7.2%
discussion / retrospecteclipse anywhere on Earth, ±1 day13875.1%2.5%10.1%
forecast / computationeclipse visible from Seoul, same day3900.0%0.0%9.0%
forecast / computationeclipse visible from Seoul, ±1 day39615.4%7.2%29.7%
forecast / computationeclipse anywhere on Earth, ±1 day391230.8%18.6%46.4%
did not occur / cloudeclipse visible from Seoul, same day8562.5%30.6%86.3%
did not occur / cloudeclipse visible from Seoul, ±1 day8562.5%30.6%86.3%
did not occur / cloudeclipse anywhere on Earth, ±1 day88100.0%67.6%100.0%
observation reporteclipse visible from Seoul, same day845565.5%54.8%74.8%
observation reporteclipse visible from Seoul, ±1 day845565.5%54.8%74.8%
observation reporteclipse anywhere on Earth, ±1 day848095.2%88.4%98.1%
not an eclipseeclipse visible from Seoul, same day4500.0%0.0%7.9%
not an eclipseeclipse visible from Seoul, ±1 day4500.0%0.0%7.9%
not an eclipseeclipse anywhere on Earth, ±1 day4500.0%0.0%7.9%
rescue ritualeclipse visible from Seoul, same day8787.5%52.9%97.8%
rescue ritualeclipse visible from Seoul, ±1 day8787.5%52.9%97.8%
rescue ritualeclipse anywhere on Earth, ±1 day8787.5%52.9%97.8%
alleclipse visible from Seoul, same day3226720.8%16.7%25.6%
alleclipse visible from Seoul, ±1 day3227723.9%19.6%28.9%
alleclipse anywhere on Earth, ±1 day32211435.4%30.4%40.8%

Seen the other way around: of the 185 computed eclipses visible from Seoul in 1392–1863, 61 (33%) have a '日食' article within ±1 day. Capture rates by magnitude are not broken out in this version.

All dated articles (322)

First 60 of 322 rows shown; the CSV has them all.

IDSolar date (Julian before 1582)TypeSeoul ±1 dEarth ±1 dDays to nearest Seoul eclipseNIKH source
waa_10207001_0011393-08-08observation reportFalseTrue856NIKH source
waa_10712014_0011399-01-21discussion / retrospectFalseFalse73NIKH source
wca_10103001_0011401-03-15did not occur / cloudTrueTrue0NIKH source
wca_10107023_0011401-09-01discussion / retrospectFalseFalse170NIKH source
wca_10606006_0021406-06-21forecast / computationFalseFalse5NIKH source
wca_11204021_0031412-05-31not an eclipseFalseFalse246NIKH source
wca_11301001_0011413-02-01observation reportTrueTrue0NIKH source
wca_11301001_0021413-02-01observation reportTrueTrue0NIKH source
wca_11505008_0021415-06-14discussion / retrospectFalseFalse7NIKH source
wda_10103009_0041419-04-03discussion / retrospectFalseFalse524NIKH source
wda_10205002_0021420-06-12not an eclipseFalseFalse88NIKH source
wda_10208001_0011420-09-08observation reportTrueTrue0NIKH source
wda_10308001_0011421-08-28observation reportTrueTrue0NIKH source
wda_10401001_0011422-01-23rescue ritualTrueTrue0NIKH source
wda_10401001_0021422-01-23observation reportTrueTrue0NIKH source
wda_10506001_0011423-07-08observation reportTrueTrue0NIKH source
wda_10611004_0011424-11-24discussion / retrospectFalseFalse505NIKH source
wda_11003030_0021428-04-14forecast / computationTrueTrue1NIKH source
wda_11004001_0011428-04-15observation reportTrueTrue0NIKH source
wda_11108001_0011429-08-30did not occur / cloudFalseTrue354NIKH source
wda_11208001_0021430-08-19observation reportTrueTrue0NIKH source
wda_11208003_0011430-08-21forecast / computationFalseFalse2NIKH source
wda_11301025_0011431-03-08discussion / retrospectFalseFalse201NIKH source
wda_11312014_0051432-01-17forecast / computationFalseFalse516NIKH source
wda_11312019_0041432-01-22discussion / retrospectFalseFalse521NIKH source
wda_11312020_0071432-01-23forecast / computationFalseFalse522NIKH source
wda_11312023_0041432-01-26discussion / retrospectFalseFalse525NIKH source
wda_11312024_0061432-01-27discussion / retrospectFalseFalse526NIKH source
wda_11401001_0021432-02-02did not occur / cloudFalseTrue532NIKH source
wda_11401004_0021432-02-05forecast / computationFalseFalse535NIKH source
wda_11501006_0031433-01-26discussion / retrospectFalseFalse891NIKH source
wda_11506001_0011433-06-17observation reportFalseTrue886NIKH source
wda_11507020_0021433-08-05discussion / retrospectFalseFalse837NIKH source
wda_11608011_0021434-09-13discussion / retrospectFalseFalse433NIKH source
wda_11611001_0011434-12-01observation reportFalseTrue354NIKH source
wda_11702015_0011435-03-14discussion / retrospectFalseFalse251NIKH source
wda_11711001_0011435-11-20observation reportTrueTrue0NIKH source
wda_11804001_0011436-04-17observation reportFalseTrue149NIKH source
wda_11903001_0011437-04-06observation reportFalseTrue503NIKH source
wda_11905021_0031437-06-24not an eclipseFalseFalse582NIKH source
wda_11906009_0021437-07-11not an eclipseFalseFalse599NIKH source
wda_12009001_0021438-09-19observation reportFalseTrue1,034NIKH source
wda_12107018_0011439-08-27forecast / computationFalseFalse1,046NIKH source
wda_12108001_0011439-09-08observation reportFalseTrue1,034NIKH source
wda_12108002_0011439-09-09discussion / retrospectFalseTrue1,033NIKH source
wda_12201029_0021440-03-02forecast / computationFalseFalse858NIKH source
wda_12405020_0011442-06-27forecast / computationFalseFalse11NIKH source
wda_12411026_0021442-12-27not an eclipseFalseFalse172NIKH source
wda_12704001_0011445-05-07observation reportTrueTrue0NIKH source
wda_12803024_0091446-04-19not an eclipseFalseFalse347NIKH source
wea_10106001_0041451-06-29observation reportTrueTrue0NIKH source
wfa_10304007_0011455-04-23discussion / retrospectFalseFalse6NIKH source
wga_10711001_0011461-12-02observation reportTrueTrue0NIKH source
wga_11407011_0011468-07-29not an eclipseFalseFalse345NIKH source
wia_10101011_0051470-02-11discussion / retrospectFalseFalse138NIKH source
wia_10106001_0011470-06-29did not occur / cloudTrueTrue0NIKH source
wia_10404001_0011473-04-27observation reportTrueTrue0NIKH source
wia_10509001_0011474-10-11observation reportTrueTrue0NIKH source
wia_10609001_0011475-09-30observation reportTrueTrue0NIKH source
wia_10609001_0031475-09-30rescue ritualTrueTrue0NIKH source

Download CSV: c_solar.csv