Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 16-01-2021 and time 15:25:14 (Italy) in region 6 km SW Valfabbrica (PG)

A magnitude ML 1.6 earthquake occured in region: 6 km SW Valfabbrica (PG), on

  • 16-01-2021 14:25:14 (UTC)
  • 16-01-2021 15:25:14 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.12, 12.56 at 8 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
Valfabbrica PG 6 3389 3389
Bastia Umbra PG 6 21874 25263
Assisi PG 7 28299 53562
Bettona PG 13 4367 57929
Cannara PG 14 4305 62234
Perugia PG 14 166134 228368
Torgiano PG 15 6725 235093
Spello PG 17 8645 243738
Valtopina PG 17 1398 245136
Nocera Umbra PG 19 5839 250975
Deruta PG 19 9669 260644

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km E of Perugia (166134 inhabitants)
22 Km NW of Foligno (57155 inhabitants)
62 Km N of Terni (111501 inhabitants)
67 Km SE of Arezzo (99543 inhabitants)
86 Km NE of Viterbo (67173 inhabitants)
89 Km SW of Fano (60888 inhabitants)
93 Km SW of Pesaro (94582 inhabitants)
95 Km SW of Ancona (100861 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 1.6 2021-01-16
14:25:14		 43.12 12.56 8 2021-01-16
14:39:58		 Sala Sismica INGV-Roma 86304491
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-16 14:25:14 ± 0.13
Latitude 43.12 ± 0.01
Longitude 12.56 ± 0.01
Depth (km) 8 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 86304491

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 747
Semi-minor axis of confidence ellipse (meter) 317
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 50
Circular confidence region, given by single value of horizontal uncertainty (meter) 750
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 234
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.08633
Epicentral distance of station farthest from the epicenter (degree) 0.47035
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 86304491
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-16 14:39:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CSP1.EHZ. 2021-01-16T14:25:31.77 0.3 undecidable manual S 93 0.4703 50 0.3 67
IV.EL6.EHZ. 2021-01-16T14:25:30.98 0.3 undecidable manual S 62 0.4452 50 0.23 68
IV.PIEI.HHZ. 2021-01-16T14:25:29.75 0.6 undecidable manual S 357 0.4164 50 -0.13 47
IV.CESI.HHZ. 2021-01-16T14:25:25.27 0.6 undecidable manual S 115 0.2752 104 -0.05 49
IV.CSP1.EHZ. 2021-01-16T14:25:24.12 0.1 undecidable manual P 93 0.4703 50 -0.12 93
IV.EL6.EHZ. 2021-01-16T14:25:23.66 0.1 undecidable manual P 62 0.4452 50 -0.16 93
IV.FOSV.EHZ. 2021-01-16T14:25:23.44 0.3 undecidable manual S 40 0.2275 107 -0.1 73
IV.PIEI.HHZ. 2021-01-16T14:25:23.15 0.1 undecidable manual P 357 0.4164 50 -0.17 93
IV.CESI.HHZ. 2021-01-16T14:25:20.69 0.1 undecidable manual P 115 0.2752 104 0 99
IV.MURB.HHZ. 2021-01-16T14:25:20.90 0.6 undecidable manual S 349 0.1457 116 0.3 48
IV.FOSV.EHZ. 2021-01-16T14:25:19.52 0.1 undecidable manual P 40 0.2275 107 -0.14 97
IV.MURB.HHZ. 2021-01-16T14:25:18.14 0.1 undecidable manual P 349 0.1457 116 0.17 98
IV.ATCC.EHZ. 2021-01-16T14:25:18.53 0.3 undecidable manual S 41 0.0863 129 -0.14 75
IV.ATCC.EHZ. 2021-01-16T14:25:16.98 0.1 positive manual P 41 0.0863 129 0.13 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATCC.EHN. ML:1.7 0.00074416115 0.16 AML other m 2021-01-16T14:25:19.28
IV.ATCC.EHE. ML:1.6 0.0006756638 0.1408 AML other m 2021-01-16T14:25:19.40
IV.MURB.HHN. ML:1.8 0.0005795 0.26 AML other m 2021-01-16T14:25:22.61
IV.MURB.HHE. ML:1.7 0.0004695 0.26 AML other m 2021-01-16T14:25:22.73
IV.FOSV.EHE. ML:1 6.450495E-5 0.1216 AML other m 2021-01-16T14:25:24.18
IV.FOSV.EHN. ML:0.9 4.8113165E-5 0.1792 AML other m 2021-01-16T14:25:23.64
IV.PIEI.HHN. ML:0.9 2.4267025E-5 0.2624 AML other m 2021-01-16T14:25:30.75
IV.PIEI.HHE. ML:1.1 3.540834E-5 0.1216 AML other m 2021-01-16T14:25:30.41
IV.MURB.HNE. ML:1.7 0.0005046168 0.2752 AML other m 2021-01-16T14:25:22.60
IV.MURB.HNN. ML:1.7 0.0005114671 0.3584 AML other m 2021-01-16T14:25:22.32
IV.CESI.HNE. ML:1.5 0.00013839758 0.8512 AML other m 2021-01-16T14:25:36.43
IV.CESI.HNN. ML:1.4 0.00011374816 0.6336 AML other m 2021-01-16T14:25:30.93
IV.CESI.HHE. ML:1.1 6.155788E-5 0.2816 AML other m 2021-01-16T14:25:28.17
IV.CESI.HHN. ML:1 4.372705E-5 0.3648 AML other m 2021-01-16T14:25:28.87
IV.EL6.EHE. ML:1.6 0.00010052495 0.9984 AML other m 2021-01-16T14:25:39.48
IV.EL6.EHN. ML:0.6 1.0247862E-5 45.3824 AML other m 2021-01-16T14:25:23.29
IV.CSP1.EHE. ML:1.6 9.8272595E-5 1.6384 AML other m 2021-01-16T14:25:47.31
IV.CSP1.EHN. ML:1.8 0.00015302065 2.144 AML other m 2021-01-16T14:25:43.88
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