Earthquake with magnitude of ML 1.1 on date 12-10-2021 and time 02:50:29 (UTC) in region 4 km W Pietralunga (PG)

A magnitude ML 1.1 earthquake occured in region: 4 km W Pietralunga (PG), on

  • 12-10-2021 02:50:29 (UTC)
  • 12-10-2021 04:50:29 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.448, 12.392 at 7 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
Pietralunga PG 4 2111 2111
Montone PG 11 1680 3791
CittĂ  di Castello PG 12 39913 43704
Apecchio PU 13 1882 45586
Umbertide PG 16 16681 62267
Gubbio PG 18 32216 94483
Piobbico PU 19 2029 96512
Monte Santa Maria Tiberina PG 19 1183 97695
Cantiano PU 19 2245 99940

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km N of Perugia (166134 inhabitants)
41 Km E of Arezzo (99543 inhabitants)
60 Km NW of Foligno (57155 inhabitants)
67 Km SW of Pesaro (94582 inhabitants)
67 Km SW of Fano (60888 inhabitants)
70 Km S of Rimini (147750 inhabitants)
78 Km S of Cesena (96758 inhabitants)
87 Km E of Siena (53903 inhabitants)
91 Km SE of Forlì (117913 inhabitants)
93 Km W of Ancona (100861 inhabitants)
98 Km E of Firenze (382808 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 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 2021-10-12
02:50:29
43.4475 12.3922 7 2021-10-12
02:54:28
Sala Sismica INGV-Roma 96456401
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-12 02:50:29 ± 0.08
Latitude 43.4475 ± 0.0027
Longitude 12.3922 ± 0.0037
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96456401

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 320
Semi-minor axis of confidence ellipse (meter) 26
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 269
Circular confidence region, given by single value of horizontal uncertainty (meter) 320
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 81
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.11
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.15288
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 96456401
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-12 02:54:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CAFI.HHZ. 2021-10-12T02:50:36.34 3.0 positive manual P -0.13 0
IV.PE3.EHZ. 2021-10-12T02:50:35.30 3.0 negative manual P 0.29 0
IV.ATMI.HHZ. 2021-10-12T02:50:35.37 0.6 undecidable manual S 219 0.1448 114 -0.08 48
IV.SSFR.HHZ. 2021-10-12T02:50:35.37 3.0 positive manual P -0.06 0
IV.ATFO.HHZ. 2021-10-12T02:50:35.83 0.6 undecidable manual S 122 0.1529 113 0.08 48
IV.APEC.HHZ. 2021-10-12T02:50:34.56 0.6 undecidable manual S 10 0.1124 120 0.21 47
IV.MURB.HHZ. 2021-10-12T02:50:34.33 1.0 undecidable manual P 0.27 0.47
IV.FRON.EHZ. 2021-10-12T02:50:34.79 3.0 positive manual P -0.05 0
IV.PARC.HHZ. 2021-10-12T02:50:34.50 1.0 undecidable manual P -0.02 0.47
IV.ATFO.HHZ. 2021-10-12T02:50:33.02 0.3 negative manual P 122 0.1529 113 -0.03 73
IV.NARO.HHZ. 2021-10-12T02:50:33.92 0.6 undecidable manual P -0.19 0.93
IV.ATMI.HHZ. 2021-10-12T02:50:32.87 0.6 positive manual P 219 0.1448 114 0 49
IV.PIEI.HHZ. 2021-10-12T02:50:32.71 1.0 negative manual P 0.13 0.47
IV.APEC.HHZ. 2021-10-12T02:50:32.31 0.3 positive manual P 10 0.1124 120 0.07 73
IV.BADI.EHZ. 2021-10-12T02:50:32.50 0.1 positive manual P 0.01 1.87
IV.ATPI.EHZ. 2021-10-12T02:50:31.77 0.3 undecidable manual S 66 0.0081 173 -0.08 74
IV.ATVO.HHZ. 2021-10-12T02:50:31.48 0.1 undecidable manual P -0.01 1.87
IV.ATPI.EHZ. 2021-10-12T02:50:30.76 0.1 undecidable manual P 66 0.0081 173 -0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ATVO.HHN. ML:1.2 0.000262 0.44 AML other m 2021-10-12T02:50:33.10
IV.ATVO.HHE. ML:1.3 0.0003335 0.16 AML other m 2021-10-12T02:50:33.31
IV.APEC.HHN. ML:1.2 0.0002035 0.28 AML other m 2021-10-12T02:50:34.63
IV.APEC.HHE. ML:1.3 0.000259 0.14 AML other m 2021-10-12T02:50:34.82
IV.BADI.EHE. ML:1 0.000111 1.08 AML other m 2021-10-12T02:50:35.19
IV.BADI.EHN. ML:1.1 0.000132 0.3 AML other m 2021-10-12T02:50:35.16
IV.PIEI.HHN. ML:1.1 0.00013 0.34 AML other m 2021-10-12T02:50:35.85
IV.PIEI.HHE. ML:1 0.0001008 0.36 AML other m 2021-10-12T02:50:35.86
IV.ATMI.HHN. ML:0.9 7.91E-5 0.54 AML other m 2021-10-12T02:50:35.83
IV.MURB.HHN. ML:1.2 9.735E-5 1.18 AML other m 2021-10-12T02:50:39.83
IV.PARC.HHE. ML:0.8 3.88E-5 0.62 AML other m 2021-10-12T02:50:39.30
IV.MURB.HHE. ML:1.2 9.8E-5 1.08 AML other m 2021-10-12T02:50:39.06
IV.PARC.HHN. ML:0.9 5.2E-5 0.7 AML other m 2021-10-12T02:50:40.43
IV.SSFR.HHE. ML:1.1 5.63E-5 0.78 AML other m 2021-10-12T02:50:40.41
IV.SSFR.HHN. ML:1.2 7.785E-5 0.48 AML other m 2021-10-12T02:50:41.32
IV.ATMI.HHE. ML:0.9 7.525E-5 0.28 AML other m 2021-10-12T02:50:41.47
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