Earthquake with magnitude of ML 1.2 on date 01-12-2021 and time 19:52:55 (UTC) in region 4 km SW Gualdo Tadino (PG)

A magnitude ML 1.2 earthquake occured in region: 4 km SW Gualdo Tadino (PG), on

  • 01-12-2021 19:52:55 (UTC)
  • 01-12-2021 20:52:55 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.213, 12.747 at 12 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
Gualdo Tadino PG 4 15208 15208
Fossato di Vico PG 9 2840 18048
Nocera Umbra PG 12 5839 23887
Valfabbrica PG 13 3389 27276
Sigillo PG 13 2404 29680
Fiuminata MC 15 1402 31082
Costacciaro PG 17 1216 32298
Esanatoglia MC 17 2034 34332
Valtopina PG 17 1398 35730
Sefro MC 18 422 36152
Fabriano AN 19 31480 67632
Assisi PG 19 28299 95931
Pioraco MC 20 1134 97065

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km N of Foligno (57155 inhabitants)
31 Km E of Perugia (166134 inhabitants)
73 Km N of Terni (111501 inhabitants)
74 Km SW of Fano (60888 inhabitants)
75 Km E of Arezzo (99543 inhabitants)
77 Km SW of Ancona (100861 inhabitants)
79 Km S of Pesaro (94582 inhabitants)
96 Km S of Rimini (147750 inhabitants)
99 Km NW of Teramo (54892 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.2 2021-12-01
19:52:55
43.2128 12.7473 12 2021-12-01
19:59:35
Sala Sismica INGV-Roma 98027071
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-01 19:52:55 ± 0.05
Latitude 43.2128 ± 0.0018
Longitude 12.7473 ± 0.0037
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 98027071

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 263
Semi-minor axis of confidence ellipse (meter) 163
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 273
Circular confidence region, given by single value of horizontal uncertainty (meter) 260
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 85
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) 0.1
Epicentral distance of station closest to the epicenter (degree) 0.08274
Epicentral distance of station farthest from the epicenter (degree) 0.35793
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:1.2

Field Value
Value 1.2
Uncertainty 0.1
Num. used stations 10
Type of magnitude ML
Reference to an origin 98027071
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-01 19:59:35
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.PIEI.HHZ. 2021-12-01T19:53:08.84 0.1 undecidable manual S 335 0.3579 93 0.01 95
IV.ARVD.HHZ. 2021-12-01T19:53:07.51 0.1 undecidable manual S 26 0.3184 93 -0.15 94
IV.FDMO.HHZ. 2021-12-01T19:53:07.39 0.3 undecidable manual S 125 0.304 93 0.13 71
IV.EL6.EHZ. 2021-12-01T19:53:06.70 0.3 undecidable manual S 66 0.2833 94 0.08 71
IV.CESI.HHZ. 2021-12-01T19:53:05.19 0.1 undecidable manual S 151 0.2374 95 -0.09 95
IV.SSFR.HHZ. 2021-12-01T19:53:04.91 0.1 undecidable manual S 6 0.2248 96 0 97
IV.PIEI.HHZ. 2021-12-01T19:53:03.41 1.0 positive manual P 335 0.3579 93 0.09 23
IV.ASSB.HHZ. 2021-12-01T19:53:03.52 0.1 undecidable manual S 201 0.1817 100 -0.13 95
IV.FDMO.HHZ. 2021-12-01T19:53:02.39 0.3 undecidable manual P 125 0.304 93 -0.01 72
IV.ARVD.HHZ. 2021-12-01T19:53:02.58 0.3 positive manual P 26 0.3184 93 -0.06 71
IV.EL6.EHZ. 2021-12-01T19:53:02.18 0.1 undecidable manual P 66 0.2833 94 0.14 94
IV.SSFR.HHZ. 2021-12-01T19:53:01.00 0.6 undecidable manual P 6 0.2248 96 -0.05 49
IV.ATCC.EHZ. 2021-12-01T19:53:01.01 0.1 undecidable manual S 250 0.0827 132 0.03 100
IV.CESI.HHZ. 2021-12-01T19:53:01.31 0.1 undecidable manual P 151 0.2374 95 0.05 97
IV.ASSB.HHZ. 2021-12-01T19:53:00.25 0.3 undecidable manual P 201 0.1817 100 -0.07 72
IV.FOSV.EHZ. 2021-12-01T19:53:00.83 0.1 undecidable manual S 7 0.0827 132 -0.14 98
IV.FOSV.EHZ. 2021-12-01T19:52:58.85 0.1 positive manual P 7 0.0827 132 0.08 99
IV.ATCC.EHZ. 2021-12-01T19:52:58.91 0.1 negative manual P 250 0.0827 132 0.13 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FOSV.EHE. ML:1.1 0.000158 0.22 AML other m 2021-12-01T19:53:00.99
IV.FOSV.EHN. ML:1 0.000129 1.62 AML other m 2021-12-01T19:53:01.11
IV.ATCC.EHN. ML:1.4 0.000299 0.36 AML other m 2021-12-01T19:53:01.29
IV.ATCC.EHE. ML:1.3 0.000212 0.6 AML other m 2021-12-01T19:53:01.11
IV.ASSB.HHE. ML:1.2 0.00010745 0.24 AML other m 2021-12-01T19:53:03.65
IV.ASSB.HHN. ML:1.1 9.135E-5 0.54 AML other m 2021-12-01T19:53:03.66
IV.SSFR.HHE. ML:1.2 9.955E-5 0.24 AML other m 2021-12-01T19:53:05.35
IV.SSFR.HHN. ML:1.2 9.005E-5 0.16 AML other m 2021-12-01T19:53:06.66
IV.FDMO.HHE. ML:1 4.325E-5 0.64 AML other m 2021-12-01T19:53:08.69
IV.FDMO.HHN. ML:1 4.09E-5 0.52 AML other m 2021-12-01T19:53:08.29
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