EarthScope IRIS FDSN · borehole tilt · nanoradians

Rock bending, read as one envelope.

Pulls horizontal tilt through service.iris.edu/fdsnws/dataselect/1/ on BTL or BORE channels, parses raw nanoradian ASCII columns, then compresses 1-minute sampling into vertical daily lines — the same tight-spike view as gravity, on the identical UTC grid.

365days compressed

46.0 – 201.1envelope nrad

liveshared UTC grid · ends 2026-10-26

Shared UTC grid · 2025-10-27 → 2026-10-26 · all four layers alignfrom to

Compare: Gravity · Tilt · Magnet · Infra — same dates, same window.

Compressed timeline · nrad

One vertical line per day on the exact same trailing-year grid as gravity — faint backdrop is the other three layers, so overlapping envelope swings at 26/09/2026 and 19/10/2026 read instantly.

Bucket

showing built-in tilt demo · trailing 12 months ending 2026-10-26

Ingest borehole tiltmeters

IRIS FDSN dataselect, format=text. Fetch one window through the app, or drop ASCII text below.

Net Station Channel Day

Drop ASCII files here or browse

Row contract

060429 000000 12.44  -8.10
060429 000100 12.51  -8.02
060429 000200 12.38  -8.15

Date, time, tilt-N (nrad), tilt-E (nrad) — the app keeps the vector magnitude so one line carries both axes.

—rows kept

—headers skipped

—daily spikes

Standalone fetch

Same ingestion the app runs server-side, as a copy-paste job.

import urllib.request
URL = "https://service.iris.edu/fdsnws/dataselect/1/query?net=BK&sta=BKS&loc=00&cha=BTL&starttime=2026-10-26T00%3A00%3A00&endtime=2026-10-26T23%3A59%3A59&format=text"
print(urllib.request.urlopen(URL, timeout=60).read().decode().splitlines()[:5])
# channels: BTL (borehole tilt) or BORE — 1-minute sampling