Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 04-12-2020 and time 03:06:33 (UTC) in region 2 km N Nocera Umbra (PG)

A magnitude ML 1.1 earthquake occured in region: 2 km N Nocera Umbra (PG), on

  • 04-12-2020 03:06:33 (UTC)
  • 04-12-2020 04:06:33 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.1340, 12.7970 at 9 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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Nocera Umbra PG 2 5839 5839
Valtopina PG 9 1398 7237
Gualdo Tadino PG 11 15208 22445
Sefro MC 13 422 22867
Fiuminata MC 13 1402 24269
Serravalle di Chienti MC 14 1070 25339
Valfabbrica PG 16 3389 28728
Assisi PG 16 28299 57027
Pioraco MC 16 1134 58161
Esanatoglia MC 18 2034 60195
Fossato di Vico PG 18 2840 63035
Spello PG 19 8645 71680

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km NE of Foligno (57155 inhabitants)
33 Km E of Perugia (166134 inhabitants)
65 Km N of Terni (111501 inhabitants)
79 Km SW of Ancona (100861 inhabitants)
81 Km S of Fano (60888 inhabitants)
83 Km E of Arezzo (99543 inhabitants)
87 Km S of Pesaro (94582 inhabitants)
91 Km NW of Teramo (54892 inhabitants)
98 Km NE of Viterbo (67173 inhabitants)
100 Km NW of L'Aquila (69753 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 2020-12-04
03:06:33		 43.1335 12.797 9 2020-12-04
05:13:42		 Sala Sismica INGV-Roma 85187911
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-04 03:06:33 ± 0.07
Latitude 43.1335 ± 0.0036
Longitude 12.7970 ± 0.0049
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 85187911

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 352
Semi-minor axis of confidence ellipse (meter) 232
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 73
Circular confidence region, given by single value of horizontal uncertainty (meter) 350.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 79
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.13580
Epicentral distance of station farthest from the epicenter (degree) 0.50182
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 85187911
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-04 05:13:42
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FDMO.HHZ. 2020-12-04T03:06:43.04 0.3 undecidable manual S 114 25.8519 110 -0.12 72
IV.MURB.HHZ. 2020-12-04T03:06:43.50 0.3 undecidable manual S 303 26.2515 109 0.2 71
IV.NARO.HHZ. 2020-12-04T03:06:43.82 1.0 negative manual P 342 55.6998 50 -0.06 23
IV.FRON.EHZ. 2020-12-04T03:06:41.68 1.0 undecidable manual P 352 43.0236 50 -0.23 23
IV.NRCA.HHZ. 2020-12-04T03:06:41.58 1.0 positive manual P 142 42.0246 50 -0.19 23
IV.MMUR.HNZ. 2020-12-04T03:06:41.81 0.1 undecidable manual P 25 37.8288 50 0.69 81
IV.SSFR.HHZ. 2020-12-04T03:06:40.17 0.6 positive manual P 358 33.6441 50 -0.29 46
IV.CSP1.EHZ. 2020-12-04T03:06:40.32 0.6 negative manual P 98 33.3444 50 -0.1 48
IV.CESI.HHZ. 2020-12-04T03:06:40.38 0.3 undecidable manual S 149 16.7721 119 0.13 73
IV.FOSV.EHZ. 2020-12-04T03:06:40.55 0.1 undecidable manual S 351 18.1707 117 -0.13 97
IV.EL6.EHZ. 2020-12-04T03:06:40.25 0.1 positive manual P 48 32.8449 50 -0.09 96
IV.SNTG.HHZ. 2020-12-04T03:06:40.60 0.3 undecidable manual S 41 17.7711 117 0.02 75
IV.ARVD.HHZ. 2020-12-04T03:06:40.85 1.0 negative manual P 16 42.1245 50 -0.92 18
IV.ASSB.HHZ. 2020-12-04T03:06:39.70 0.1 undecidable manual S 228 15.0738 121 -0.06 99
IV.FDMO.HHZ. 2020-12-04T03:06:39.02 0.1 undecidable manual P 114 25.8519 110 -0.11 96
IV.MURB.HHZ. 2020-12-04T03:06:39.08 0.3 undecidable manual P 303 26.2515 109 -0.13 72
IV.FOSV.EHZ. 2020-12-04T03:06:37.68 0.1 undecidable manual P 351 18.1707 117 -0.02 99
IV.SNTG.HHZ. 2020-12-04T03:06:37.76 0.1 undecidable manual P 41 17.7711 117 0.12 98
IV.ASSB.HHZ. 2020-12-04T03:06:37.19 0.1 undecidable manual P 228 15.0738 121 0.02 100
IV.CESI.HHZ. 2020-12-04T03:06:37.56 0.1 negative manual P 149 16.7721 119 0.11 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASSB.HHN. ML:1.1 0.000129 0.28 AML other m 2020-12-04T03:06:39.96
IV.ASSB.HHE. ML:1.0 0.000106 0.1 AML other m 2020-12-04T03:06:40.40
IV.CESI.HHE. ML:0.9 0.0000742 0.7 AML other m 2020-12-04T03:06:41.39
IV.CESI.HHN. ML:0.8 0.00006115000000000001 1.26 AML other m 2020-12-04T03:06:41.04
IV.SSFR.HHE. ML:1.3 0.000079 0.2 AML other m 2020-12-04T03:06:45.81
IV.SSFR.HHN. ML:1.2 0.00007230000000000001 1.06 AML other m 2020-12-04T03:06:45.80
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