Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 09-01-2021 and time 04:38:51 (Italy) in region 4 km N Nocera Umbra (PG)

A magnitude ML 1.1 earthquake occured in region: 4 km N Nocera Umbra (PG), on

  • 09-01-2021 03:38:51 (UTC)
  • 09-01-2021 04:38:51 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.15, 12.8 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 4 5839 5839
Gualdo Tadino PG 9 15208 21047
Valtopina PG 11 1398 22445
Fiuminata MC 12 1402 23847
Sefro MC 12 422 24269
Serravalle di Chienti MC 15 1070 25339
Pioraco MC 16 1134 26473
Valfabbrica PG 16 3389 29862
Fossato di Vico PG 16 2840 32702
Esanatoglia MC 17 2034 34736
Assisi PG 17 28299 63035

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km NE of Foligno (57155 inhabitants)
34 Km E of Perugia (166134 inhabitants)
67 Km N of Terni (111501 inhabitants)
78 Km SW of Ancona (100861 inhabitants)
79 Km S of Fano (60888 inhabitants)
82 Km E of Arezzo (99543 inhabitants)
85 Km S of Pesaro (94582 inhabitants)
92 Km NW of Teramo (54892 inhabitants)
99 Km NE of Viterbo (67173 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 1.1 2021-01-09
03:38:51		 43.15 12.8 9 2021-01-09
03:44:51		 Sala Sismica INGV-Roma 86111661
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-09 03:38:51 ± 0.05
Latitude 43.15 ± 0.00
Longitude 12.80 ± 0.00
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 86111661

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 215
Semi-minor axis of confidence ellipse (meter) 212
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 137
Circular confidence region, given by single value of horizontal uncertainty (meter) 210
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 76
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.12
Epicentral distance of station closest to the epicenter (degree) 0.14569
Epicentral distance of station farthest from the epicenter (degree) 0.30217
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 86111661
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-09 03:44:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2021-01-09T03:39:03.42 0.3 undecidable manual S 101 0.3022 50 0.19 70
IV.EL6.EHZ. 2021-01-09T03:39:02.55 0.3 undecidable manual S 51 0.2833 50 -0.13 71
IV.FDMO.HHZ. 2021-01-09T03:39:00.98 0.3 undecidable manual S 118 0.2401 109 -0.12 72
IV.CSP1.EHZ. 2021-01-09T03:38:58.11 1.0 positive manual P 101 0.3022 50 -0.1 24
IV.CESI.HHZ. 2021-01-09T03:38:58.48 0.3 undecidable manual S 152 0.1655 116 0.04 74
IV.MURB.HHN. 2021-01-09T03:38:57.05 0.6 undecidable manual P 299 0.2284 109 0.3 46
IV.SNTG.HHZ. 2021-01-09T03:38:57.83 0.3 undecidable manual S 45 0.1466 119 0.04 75
IV.EL6.EHZ. 2021-01-09T03:38:57.72 0.6 positive manual P 51 0.2833 50 -0.17 47
IV.ASSB.HHE. 2021-01-09T03:38:57.74 0.3 undecidable manual S 223 0.1493 118 -0.15 73
IV.FOSV.EHZ. 2021-01-09T03:38:57.77 0.3 undecidable manual S 349 0.1457 119 -0.02 75
IV.FDMO.HHZ. 2021-01-09T03:38:56.83 1.0 negative manual P 118 0.2401 109 -0.15 24
IV.SNTG.HHZ. 2021-01-09T03:38:55.20 0.6 negative manual P 45 0.1466 119 0.13 49
IV.ASSB.HHE. 2021-01-09T03:38:55.13 0.1 undecidable manual P 223 0.1493 118 0 100
IV.CESI.HHZ. 2021-01-09T03:38:55.66 0.6 undecidable manual P 152 0.1655 116 0.21 48
IV.FOSV.EHZ. 2021-01-09T03:38:54.99 0.3 undecidable manual P 349 0.1457 119 -0.08 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SNTG.HHE. ML:0.8 6.3355045E-5 0.24 AML other m 2021-01-09T03:38:57.91
IV.SNTG.HHN. ML:0.4 2.65325015E-5 0.2208 AML other m 2021-01-09T03:38:58.20
IV.SNTG.HNE. ML:1.3 0.0001707613 0.8896 AML other m 2021-01-09T03:38:57.47
IV.SNTG.HNN. ML:1.2 0.0001531849 0.8192 AML other m 2021-01-09T03:38:55.18
IV.CESI.HHE. ML:0.6 2.943578E-5 0.7392 AML other m 2021-01-09T03:39:05.71
IV.CESI.HHN. ML:0.4 2.131172E-5 0.68 AML other m 2021-01-09T03:39:08.54
IV.CESI.HNE. ML:1.3 0.00014862195 0.9696 AML other m 2021-01-09T03:38:58.25
IV.CESI.HNN. ML:1.3 0.00016558495 0.6304 AML other m 2021-01-09T03:39:01.56
IV.FDMO.HHE. ML:0.7 3.1629575E-5 2.1616 AML other m 2021-01-09T03:39:15.80
IV.FDMO.HHN. ML:0.4 1.70184525E-5 0.2208 AML other m 2021-01-09T03:39:01.41
IV.EL6.EHE. ML:1.4 0.000119301025 1.7008 AML other m 2021-01-09T03:38:59.54
IV.EL6.EHN. ML:1.2 8.062492E-5 2.2 AML other m 2021-01-09T03:39:12.46
IV.CSP1.EHE. ML:1.3 8.0603405E-5 1.72 AML other m 2021-01-09T03:39:17.69
IV.CSP1.EHN. ML:1.3 8.488619E-5 1.4608 AML other m 2021-01-09T03:39:15.99
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download