{'fraction_non_alphanumeric': 0.03205673758865248, 'fraction_numerical': 0.03574468085106383, 'mean_word_length': 4.677938808373591, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 6, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
SOLAR-PROTON EVENT-INTEGRATED FLUENCES DURING THE CURRENT SOLAR CYCLE.

The event-integrated fluences of energetic solar protons from 1996 up through 2005 at the Earth have been compiled and compared to previous data. The current solar cycle has been very active, and very large fluxes of solar protons have been observed. The average solar-proton fluxes for the current solar cycle have been the highest observed using satellite measurements, since about 1976. Introduction: The fluxes of solar energetic particles (SEPs) are used for many studies, such as the study of the Sun and recent histories of extraterrestrial samples. High solar-proton fluxes are a very serious radiation hazard in the inner solar system and have had serious effects on interplanetary spacecraft and on material exposed to these energetic protons. Modern fluxes of solar protons need to be known to compare with those inferred from long-lived or stable cosmogenic nuclides in lunar samples [1,2]. Modern solar particle events (since 1956) were more intense than during previous periods. Since then, the approximately 11 year solar cycle (number 23) that started in 1996 has been a very active one, continuing the trend. Since 2000, there were several solar particle events (SPEs) with very high fluxes of solar protons [cf., 3]. These recent SPEs have affected instruments and spacecraft, including Mars Odyssey, causing them to turn off, fortunately usually into safe modes with eventual recovery. They also have activated material exposed in space, such as the Genesis capsule [4]. The fluences of solar protons in the current solar cycle were compiled and compared with other data. Event-Integrated Solar-Proton fluxes: The website for solar-proton-flux data from the Geostationary Operational Environmental Satellites (GOES) was used to get the fluences of energetic solar protons integrated over the 80 largest SPEs for energies above 6 energies. Data from events with closely-spaced multiple peaks were combined. This evaluation of the data for fluences >10 MeV is in good agreement with data through 2002 from GOES satellites [5], with some minor disagreement for the weakest events where differences in background corrections can affect the data. As recommended by the GOES investigators and the GOES website, measurements from GOES-8 were used until early 2003, and data from GOES-11 were used from the middle of 2003. Data for one weak event in 2003 were from GOES-10. GOES-8 data up to 2002 agree with those from other satellites [5]. For the year 2004, the GOES-11 data agree with data from the Interplanetary Monitoring Platform (IMP) 8 satellite [6] for energies >10 and >30 MeV. The eventintegrated solar-proton fluences for the 25 largest events (based on the >30 MeV fluences) are in Table 1. Fig. 1 gives the event-integrated fluxes of solar protons >10 and >30 MeV from 1996 until the end of 2005. Also shown is the smoothed monthly sunspot number. Solar cycle 23 started in 1996, the first SPE above a threshold of ~10 protons/cm was in late 1997, and only on 7/14/2000 (near the sunspot peak) did one of the largest events ever occurred. Large events have occurred until Jan. 2005. The Jan. 2005 event was fairly large for being about 2 years from the expected end of the solar cycle, as the four year period around the minimum in solar activity (when the smoothed sunspot number is below 50) is not expected to have large solar particle events [7]. However, it was about an order of magnitude smaller than the largest events.