Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 12-01-2021 and time 11:25:59 (Italy) in region 5 km NW Gualdo Tadino (PG)

A magnitude ML 0.8 earthquake occured in region: 5 km NW Gualdo Tadino (PG), on

  • 12-01-2021 10:25:59 (UTC)
  • 12-01-2021 11:25:59 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.25, 12.74 at 11 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
Gualdo Tadino PG 5 15208 15208
Fossato di Vico PG 5 2840 18048
Sigillo PG 9 2404 20452
Costacciaro PG 12 1216 21668
Valfabbrica PG 15 3389 25057
Nocera Umbra PG 16 5839 30896
Fabriano AN 17 31480 62376
Gubbio PG 17 32216 94592
Esanatoglia MC 17 2034 96626
Fiuminata MC 17 1402 98028
Scheggia e Pascelupo PG 18 1393 99421

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km NE of Perugia (166134 inhabitants)
33 Km N of Foligno (57155 inhabitants)
70 Km SW of Fano (60888 inhabitants)
73 Km E of Arezzo (99543 inhabitants)
75 Km S of Pesaro (94582 inhabitants)
75 Km SW of Ancona (100861 inhabitants)
77 Km N of Terni (111501 inhabitants)
91 Km S of Rimini (147750 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 0.8 2021-01-12
10:25:59		 43.25 12.74 11 2021-01-12
10:42:01		 Sala Sismica INGV-Roma 86199671
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-12 10:25:59 ± 0.06
Latitude 43.25 ± 0.00
Longitude 12.74 ± 0.00
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 86199671

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 378
Semi-minor axis of confidence ellipse (meter) 56
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 281
Circular confidence region, given by single value of horizontal uncertainty (meter) 380
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 106
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.09713
Epicentral distance of station farthest from the epicenter (degree) 0.31836
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:0.8

Field Value
Value 0.8
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 86199671
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-12 10:42:01
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.PIEI.HHZ. 2021-01-12T10:26:11.51 0.3 undecidable manual S 333 0.3184 50 0.27 69
IV.FRON.EHZ. 2021-01-12T10:26:09.50 0.3 undecidable manual S 358 0.2653 50 -0.17 71
IV.SSFR.HHZ. 2021-01-12T10:26:07.13 0.3 undecidable manual S 10 0.1862 117 -0.21 71
IV.ASSB.HHZ. 2021-01-12T10:26:07.95 0.3 undecidable manual S 195 0.2176 50 -0.31 70
IV.ATFO.HHZ. 2021-01-12T10:26:06.62 0.3 undecidable manual S 314 0.1655 120 0.01 75
IV.SNTG.HHZ. 2021-01-12T10:26:06.10 0.3 undecidable manual S 89 0.1493 123 0.02 75
IV.PIEI.HHZ. 2021-01-12T10:26:06.53 0.1 undecidable manual P 333 0.3184 50 0.35 90
IV.ATSC.EHZ. 2021-01-12T10:26:06.59 0.3 undecidable manual S 348 0.1754 119 -0.35 69
IV.MURB.HHZ. 2021-01-12T10:26:06.40 0.3 undecidable manual S 274 0.1538 122 0.15 73
IV.FRON.EHZ. 2021-01-12T10:26:05.18 0.1 undecidable manual P 358 0.2653 50 -0.09 96
IV.ASSB.HHZ. 2021-01-12T10:26:04.34 0.1 undecidable manual P 195 0.2176 50 -0.11 96
IV.ATCC.EHZ. 2021-01-12T10:26:04.41 0.3 undecidable manual S 226 0.0971 135 -0.1 74
IV.ATSC.EHZ. 2021-01-12T10:26:03.60 0.1 undecidable manual P 348 0.1754 119 -0.09 98
IV.MURB.HHZ. 2021-01-12T10:26:03.35 0.1 undecidable manual P 274 0.1538 122 0.06 99
IV.ATFO.HHZ. 2021-01-12T10:26:03.54 0.3 undecidable manual P 314 0.1655 120 0.04 74
IV.SNTG.HHZ. 2021-01-12T10:26:03.50 0.1 undecidable manual P 89 0.1493 123 0.3 94
IV.SSFR.HHZ. 2021-01-12T10:26:03.94 0.1 undecidable manual P 10 0.1862 117 0.02 99
IV.ATCC.EHZ. 2021-01-12T10:26:02.34 0.1 undecidable manual P 226 0.0971 135 0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATCC.EHN. ML:1 0.0001153 0.38 AML other m 2021-01-12T10:26:04.44
IV.ATCC.EHE. ML:1.1 0.000151 0.22 AML other m 2021-01-12T10:26:04.55
IV.MURB.HHE. ML:1.3 0.0001685 0.24 AML other m 2021-01-12T10:26:06.63
IV.MURB.HHN. ML:1.1 0.000107 0.72 AML other m 2021-01-12T10:26:06.49
IV.MURB.HNE. ML:1.2 0.0001518657 0.2368 AML other m 2021-01-12T10:26:06.74
IV.SNTG.HHE. ML:0.6 3.4313045E-5 0.3008 AML other m 2021-01-12T10:26:06.33
IV.SNTG.HHN. ML:0.9 6.6087815E-5 0.224 AML other m 2021-01-12T10:26:06.17
IV.ATFO.HHE. ML:0.6 3.5962015E-5 0.16 AML other m 2021-01-12T10:26:06.88
IV.ATFO.HHN. ML:0.6 2.751525E-5 0.2624 AML other m 2021-01-12T10:26:07.39
IV.ASSB.HHE. ML:0.6 2.4260375E-5 0.1216 AML other m 2021-01-12T10:26:08.08
IV.ASSB.HHN. ML:0.5 1.9232622E-5 0.096 AML other m 2021-01-12T10:26:08.25
IV.FRON.EHE. ML:0.5 1.37169425E-5 0.1408 AML other m 2021-01-12T10:26:09.73
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