📍 Your locator:
Bluesky Telegram 📡 Log ℹ Info
Connecting...
📡 Fetching data from DX Cluster...
Total spots
—
VHF banden
2m (144)
—
spots
6m (50)
—
spots
4m (70)
—
spots
8m
—
40 MHz spots
All bands
144 MHz — 2m
50 MHz — 6m
70 MHz — 4m
40 MHz — 8m
2m (144 MHz)
6m (50 MHz)
4m (70 MHz)
🚢 Tropo indicator — AIS reception
Loading...
NormalLightGoodExcellent
🌌 Aurora indicator — K-index
Loading...
QuietUnsettledStormSevere
Air pressure — Leeuwarden (JO23)7 days · Open-Meteo
High pressure (>1020 hPa) = favourable for VHF/UHF tropo
MUF indicator — Es activiteitfoEs-berekening · laatste 30 min · 2m vereist ES in comment
Berekenen...
—
6m
50.313 MHz
—
4m
70.154 MHz
—
2m
144.174 MHz
Geschatte MUF(Es) in MHz via foEs terugberekening · 10e percentiel kortste paden · Es hoogte 110 km · hover voor foEs
BandStationSpotterOpmerking Freq (MHz)ModeTime
⏳ Spots worden opgehaald...
🕐 Activity heatmap — spots per hour UTC
000306091215182123
📅 History — Es season click a day to view spots
ma
di
wo
do
vr
za
zo
Sporadic E
Tropo
Aurora
Select a day to view spots.
Data: DXSpider network · PSKreporter · fmlist.org
ℹ How to read this map

What you see

Real-time VHF propagation via Sporadic-E (Es) — a thin ionised layer at ~105 km altitude that reflects radio signals over long distances.

Map layers

Amateur radio spots (FT8 / SSB / CW)
FM broadcast DX via Es (fmlist.org)
Amateur Es cloud
FM Es cloud

MUF & foEs

The MUF (Max Usable Frequency) rises with Es intensity. A higher MUF opens higher bands:

MUF > 50 MHz → 6m open  ·  MUF > 70 MHz → 4m  ·  MUF > 144 MHz → 2m

The foEs is the critical frequency of the Es layer, back-calculated from active spots. FM spots (88–108 MHz) give the most accurate foEs.

foEs vs 2m chance

foEs144 MHz chance
< 15 MHz❌ Very unlikely
15–20 MHz🟡 Small
20–25 MHz🟠 Possible
25–30 MHz🟢 Good
> 30 MHz✅ Strong

Your locator & arrow

Enter your locator to see an arrow pointing to Es clouds within single-hop range (~675 km), with the MUF for your specific path.

Data sources

DXSpider  ·  PSKreporter  ·  fmlist.org

PA2DX · muf-dog.nl · JO23XE