MAGNETIC OBSERVATORY, HERMANUS SOUTH AFRICA, IN COLLABORATION WITH THE COSMIC RAY RESEARCH UNIT, POTCHEFSTROOM UNIVERSITY HERMANUS 12-NM-64 NEUTRON MONITOR COORDINATES 34 25 S, 19 13 E ALTITUDE 26 METERS REAL COUNTS 100 TIMES TABULATED VALUES CORRECTED TO 760.0 MM HG CO-EFFICIENT 0.95 PERCENT/MM HG DATE DAY UT 01 02 03 04 05 06 07 08 09 10 11 12 DAILY MEANS 13 14 15 16 17 18 19 20 21 22 23 24 1 12 1977 335 4378 4404 4401 4400 4374 4364 4409 4395 4394 4407 4411 4417 4425 4415 4442 4411 4411 4408 4411 4421 4406 4415 4428 4420 4407.0 24 2 12 1977 336 4453 4422 4446 4416 4465 4445 4447 4437 4435 4444 4448 4476 4475 4455 4418 4400 4435 4452 4472 4469 4454 4450 4443 4420 4444.9 24 3 12 1977 337 4434 4466 4466 4452 4447 4418 4453 4421 4422 4428 4430 4413 4423 4431 4442 4455 4455 4452 4433 4436 4421 4419 4430 4425 4436.3 24 4 12 1977 338 4447 4453 4426 4423 4420 4446 4448 4436 4446 4445 4467 4458 4458 4468 4452 4446 4444 4454 4456 4463 4462 4495 4443 4455 4450.5 24 5 12 1977 339 4463 4454 4466 4461 4474 4479 4471 4449 4448 4467 4459 4470 4479 4495 4467 4454 4438 4465 4452 4454 4461 4463 4458 4457 4462.7 24 6 12 1977 340 4469 4484 4500 4466 4451 4440 4464 4466 4483 4479 4480 4486 4463 4479 4465 4456 4450 4451 4451 4458 4473 4480 4466 4468 4467.8 24 7 12 1977 341 4466 4470 4473 4482 4470 4487 4495 4475 4470 4469 4479 4482 4450 4431 4474 4455 4444 4458 4461 4443 4452 4467 4464 4479 4466.5 24 8 12 1977 342 4487 4464 4471 4461 4470 4453 4474 4454 4465 4468 4459 4456 4469 4476 4471 4473 4453 4478 4461 4460 4447 4456 4466 4451 4464.3 24 9 12 1977 343 4462 4460 4461 4454 4469 4493 4479 4467 4490 4470 4491 4491 4481 4460 4457 4458 4457 4487 4476 4472 4453 4467 4483 4455 4470.5 24 10 12 1977 344 4484 4453 4449 4462 4462 4458 4453 4469 4482 4492 4495 4494 4497 4463 4492 4486 4467 4479 4469 4462 4480 4477 4461 4474 4473.3 24 11 12 1977 345 4481 4461 4444 4453 4454 4457 4508 4495 4503 4533 4552 4558 4558 4540 4521 4517 4521 4510 4515 4484 4488 4496 4480 4468 4499.9 24 12 12 1977 346 4476 4480 4472 4470 4501 4495 4500 4484 4494 4467 4488 4493 4484 4481 4483 4472 4483 4478 4476 4480 4480 4466 4463 4447 4479.7 24 13 12 1977 347 4444 4430 4422 4401 4409 4410 4425 4426 4419 4427 4461 4424 4435 4425 4404 4426 4415 4415 4427 4415 4424 4414 4417 4411 4421.9 24 14 12 1977 348 4403 4427 4418 4405 4408 4417 4420 4431 4440 4469 4456 4439 4453 4441 4436 4409 4424 4398 4408 4417 4430 4418 4429 4420 4425.7 24 15 12 1977 349 4413 4414 4393 4421 4410 4426 4415 4432 4446 4447 4450 4453 4446 4449 4437 4416 4433 4430 4415 4405 4414 4397 4380 4388 4422.1 24 16 12 1977 350 4416 4402 4408 4435 4437 4440 4454 4423 4437 4445 4443 4432 4447 4402 4405 4403 4409 4422 4438 4423 4413 4431 4439 4425 4426.2 24 17 12 1977 351 4449 4431 4446 4477 4465 4464 4491 4467 4467 4494 4489 4452 4465 4448 4446 4440 4426 4446 4433 4399 4437 4409 4410 4437 4449.5 24 18 12 1977 352 4427 4429 4442 4455 4453 4447 4453 4441 4458 4467 4435 4440 4462 4453 4432 4440 4457 4437 4462 4444 4419 4434 4408 4415 4442.1 24 19 12 1977 353 4403 4412 4399 4441 4481 4469 4443 4434 4451 4439 4438 4434 4425 4411 4420 4439 4432 4418 4431 4431 4437 4427 4425 4424 4431.8 24 20 12 1977 354 4421 4420 4422 4439 4428 4407 4410 4417 4438 4398 4432 4472 4448 4440 4415 4435 4438 4442 4430 4404 4404 4429 4421 4409 4425.8 24 21 12 1977 355 4405 4427 4430 4436 4448 4437 4437 4440 4470 4417 4447 4454 4428 4426 4431 4432 4440 4417 4425 4418 4432 4428 4447 4450 4434.3 24 22 12 1977 356 4428 4441 4421 4436 4435 4464 4438 4465 4451 4464 4457 4459 4445 4446 4451 4451 4449 4458 4449 4451 4435 4437 4458 4434 4446.8 24 23 12 1977 357 4424 4417 4438 4421 4431 4451 4441 4428 4441 4442 4464 4453 4451 4461 4443 4444 4443 4428 4458 4425 4450 4463 4452 4444 4442.2 24 24 12 1977 358 4459 4452 4430 4437 4445 4418 4434 4438 4443 4419 4429 4447 4456 4434 4442 4459 4440 4452 4438 4437 4465 4444 4454 4429 4441.7 24 25 12 1977 359 4445 4432 4432 4420 4417 4409 4448 4443 4428 4444 4443 4442 4444 4453 4418 4424 4445 4437 4434 4418 4449 4433 4462 4483 4437.6 24 26 12 1977 360 4466 4472 4465 4460 4465 4446 4423 4441 4426 4413 4419 4404 4392 4390 4397 4396 4392 4385 4393 4414 4425 4408 4410 4410 4421.3 24 27 12 1977 361 4421 4427 4439 4441 4440 4434 4431 4422 4419 4398 4411 4413 4405 4399 4419 4405 4408 4394 4396 4392 4404 4405 4411 4404 4414.1 24 28 12 1977 362 4422 4395 4401 4411 4407 4405 4408 4396 4398 4400 4399 4406 4399 4407 4421 4403 4397 4404 4401 4453 4422 4440 4424 4399 4409.1 24 29 12 1977 363 4376 4413 4404 4419 4416 4410 4421 4423 4394 4409 4406 4397 4414 4402 4418 4424 4405 4391 4395 4415 4406 4403 4415 4408 4407.7 24 30 12 1977 364 4398 4419 4423 4419 4405 4390 4400 4395 4412 4415 4431 4437 4436 4434 4444 4415 4420 4403 4416 4402 4408 4404 4398 4407 4413.8 24 31 12 1977 365 4414 4395 4414 4391 4381 4376 4376 4396 4389 4380 4402 4421 4417 4441 4414 4432 4402 4389 4387 4386 4375 4392 4382 4377 4397.0 24 MONTHLY MEANS 4437 4436 4436 4438 4440 4437 4444 4439 4444 4444 4451 4451 4449 4444 4441 4438 4437 4437 4438 4434 4436 4438 4436 4432 4439.8 C-12