Earthquake with magnitude of ML 1.1 on date 18-09-2021 and time 04:54:15 (UTC) in region 7 km SW Monte Cavallo (MC)

A magnitude ML 1.1 earthquake occured in region: 7 km SW Monte Cavallo (MC), on

  • 18-09-2021 04:54:15 (UTC)
  • 18-09-2021 06:54:15 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9440, 12.9610 at 10 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Sellano PG 7 1079 1079
Monte Cavallo MC 7 145 1224
Preci PG 10 724 1948
Visso MC 11 1107 3055
Pieve Torina MC 14 1458 4513
Cerreto di Spoleto PG 14 1075 5588
Serravalle di Chienti MC 14 1070 6658
Ussita MC 15 444 7102
Fiordimonte MC 15 202 7304
Castelsantangelo sul Nera MC 17 281 7585
Pievebovigliana MC 17 866 8451
Muccia MC 17 915 9366
Trevi PG 19 8469 17835
Fiastra MC 19 559 18394
Norcia PG 20 4957 23351
Acquacanina MC 20 121 23472

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km E of Foligno (57155 inhabitants)
50 Km NE of Terni (111501 inhabitants)
50 Km E of Perugia (166134 inhabitants)
68 Km W of Teramo (54892 inhabitants)
75 Km NW of L'Aquila (69753 inhabitants)
88 Km SW of Ancona (100861 inhabitants)
91 Km NE of Viterbo (67173 inhabitants)
100 Km S of Fano (60888 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.1 2021-09-18
04:54:15
42.9437 12.9612 10 2021-09-18
04:58:36
Sala Sismica INGV-Roma 95569111
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-18 04:54:15 ± 0.04
Latitude 42.9437 ± 0.0018
Longitude 12.9612 ± 0.0037
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95569111

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 243
Semi-minor axis of confidence ellipse (meter) 188
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 75
Circular confidence region, given by single value of horizontal uncertainty (meter) 240.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 103
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.11
Epicentral distance of station closest to the epicenter (degree) 0.07374
Epicentral distance of station farthest from the epicenter (degree) 0.33635
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.1
Num. used stations 10
Type of magnitude ML
Reference to an origin 95569111
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-18 04:58:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SNTG.HHZ. 2021-09-18T04:54:27.60 0.1 undecidable manual S 357 34.5432 50 0.09 96
IV.CSP1.EHZ. 2021-09-18T04:54:25.26 0.1 undecidable manual S 50 25.752 50 0.12 97
IV.ASSB.HHZ. 2021-09-18T04:54:25.40 0.1 undecidable manual S 294 26.8509 50 -0.05 98
IV.GAVE.EHZ. 2021-09-18T04:54:25.96 0.1 undecidable manual S 191 28.4493 50 0.1 97
IV.MML1.EHZ. 2021-09-18T04:54:23.06 0.1 undecidable manual S 3 18.87 119 -0.08 99
IV.SNTG.HHZ. 2021-09-18T04:54:22.44 0.3 negative manual P 357 34.5432 50 -0.06 72
IV.ATCC.EHZ. 2021-09-18T04:54:22.90 0.6 negative manual P 316 37.3293 50 -0.03 48
IV.NRCA.HHZ. 2021-09-18T04:54:22.66 0.1 undecidable manual S 134 17.4714 121 -0.04 100
IV.ASSB.HHZ. 2021-09-18T04:54:21.08 0.1 positive manual P 294 26.8509 50 -0.23 94
IV.GAVE.EHZ. 2021-09-18T04:54:21.52 0.6 negative manual P 191 28.4493 50 -0.03 49
IV.FDMO.HHZ. 2021-09-18T04:54:21.71 0.1 undecidable manual S 45 14.5743 126 -0.15 98
IV.CSP1.EHZ. 2021-09-18T04:54:21.07 1.0 undecidable manual P 50 25.752 50 -0.06 25
IV.CESI.HHZ. 2021-09-18T04:54:20.45 0.1 undecidable manual S 326 8.1807 142 0.19 98
IV.MML1.EHZ. 2021-09-18T04:54:20.07 1.0 undecidable manual P 3 18.87 119 0.09 25
IV.FDMO.HHZ. 2021-09-18T04:54:19.30 0.1 negative manual P 45 14.5743 126 0.06 100
IV.NRCA.HHZ. 2021-09-18T04:54:19.70 0.6 undecidable manual P 134 17.4714 121 -0.03 50
IV.CESI.HHZ. 2021-09-18T04:54:18.53 1.0 undecidable manual P 326 8.1807 142 0.22 24
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHN. ML:1.4 0.0003305 0.2 AML other m 2021-09-18T04:54:20.50
IV.CESI.HHE. ML:1.3 0.000249 0.18 AML other m 2021-09-18T04:54:20.66
IV.FDMO.HHN. ML:1.0 0.0001021 0.2 AML other m 2021-09-18T04:54:21.80
IV.FDMO.HHE. ML:1.1 0.00011750000000000001 1.12 AML other m 2021-09-18T04:54:22.32
IV.NRCA.HHN. ML:1.2 0.0001445 0.66 AML other m 2021-09-18T04:54:22.33
IV.MML1.EHN. ML:0.9 0.00006525 0.3 AML other m 2021-09-18T04:54:23.42
IV.MML1.EHE. ML:1.1 0.00009389999999999999 0.2 AML other m 2021-09-18T04:54:23.27
IV.NRCA.HHE. ML:1.2 0.00014000000000000001 0.12 AML other m 2021-09-18T04:54:23.33
IV.GAVE.EHE. ML:1.1 0.00006065 0.16 AML other m 2021-09-18T04:54:26.74
IV.GAVE.EHN. ML:1.0 0.00005300000000000001 0.56 AML other m 2021-09-18T04:54:26.95
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download