Earthquake with magnitude of ML 1.2 on date 16-10-2021 and time 16:55:38 (Italy) in region 5 km NW Preci (PG)

A magnitude ML 1.2 earthquake occured in region: 5 km NW Preci (PG), on

  • 16-10-2021 14:55:38 (UTC)
  • 16-10-2021 16:55:38 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.906, 12.994 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Preci PG 5 724 724
Sellano PG 6 1079 1803
Visso MC 8 1107 2910
Monte Cavallo MC 10 145 3055
Cerreto di Spoleto PG 11 1075 4130
Ussita MC 13 444 4574
Castelsantangelo sul Nera MC 13 281 4855
Norcia PG 15 4957 9812
Pieve Torina MC 16 1458 11270
Fiordimonte MC 17 202 11472
Vallo di Nera PG 19 364 11836
Serravalle di Chienti MC 19 1070 12906
Pievebovigliana MC 19 866 13772
Fiastra MC 20 559 14331

Municipalities with at least 50000 inhabitants

An earthquake occurred to
24 Km E of Foligno (57155 inhabitants)
48 Km NE of Terni (111501 inhabitants)
54 Km E of Perugia (166134 inhabitants)
64 Km W of Teramo (54892 inhabitants)
70 Km NW of L'Aquila (69753 inhabitants)
90 Km SW of Ancona (100861 inhabitants)
91 Km NE of Viterbo (67173 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 1.2 2021-10-16
14:55:38
42.9063 12.9943 11 2021-10-16
15:09:03
Sala Sismica INGV-Roma 96650951
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-16 14:55:38 ± 0.11
Latitude 42.9063 ± 0.0063
Longitude 12.9943 ± 0.0074
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96650951

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 782
Semi-minor axis of confidence ellipse (meter) 491
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 41
Circular confidence region, given by single value of horizontal uncertainty (meter) 780
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 169
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.28059
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.5
Num. used stations 12
Type of magnitude ML
Reference to an origin 96650951
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-16 15:09:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SSFR.HNZ. 2021-10-16T14:55:49.47 3.0 negative manual P -0.01 0
IV.ASSB.HHE. 2021-10-16T14:55:49.82 0.1 undecidable manual S 299 0.2806 50 0.03 97
IV.CSP1.EHZ. 2021-10-16T14:55:48.69 0.3 undecidable manual S 40 0.241 50 0.07 73
IV.MC2.EHZ. 2021-10-16T14:55:46.03 0.3 undecidable manual S 88 0.143 124 0.4 69
IV.FDMO.HHZ. 2021-10-16T14:55:45.57 0.3 undecidable manual S 28 0.1466 124 -0.2 72
IV.ASSB.HHE. 2021-10-16T14:55:45.20 0.1 undecidable manual P 299 0.2806 50 -0.02 97
IV.CESI.HHZ. 2021-10-16T14:55:45.19 0.3 undecidable manual S 326 0.1187 130 0.3 71
IV.CSP1.EHZ. 2021-10-16T14:55:44.35 0.6 positive manual P 40 0.241 50 -0.19 47
IV.FEMA.HNE. 2021-10-16T14:55:44.00 0.3 undecidable manual S 36 0.0692 145 0.42 70
IV.NRCA.HHE. 2021-10-16T14:55:44.55 0.3 undecidable manual S 130 0.1142 131 -0.21 72
IT.MTCL.HGE. 2021-10-16T14:55:43.30 0.3 undecidable manual S 2 0.0872 138 -0.73 62
IT.MTCL.HGE. 2021-10-16T14:55:42.13 0.1 undecidable manual P 2 0.0872 138 0.23 96
IV.CESI.HHZ. 2021-10-16T14:55:42.62 1.0 positive manual P 326 0.1187 130 0.23 24
IV.FDMO.HHZ. 2021-10-16T14:55:42.89 0.1 undecidable manual P 28 0.1466 124 -0.01 100
IV.MC2.EHZ. 2021-10-16T14:55:42.82 0.1 undecidable manual P 88 0.143 124 0 100
IV.NRCA.HHE. 2021-10-16T14:55:42.28 0.1 undecidable manual P 130 0.1142 131 -0.03 100
IV.FEMA.HNE. 2021-10-16T14:55:41.41 0.1 undecidable manual P 36 0.0692 145 -0.22 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SSFR.HHE. ML:1.6 8.191058E-5 0.0512 AML other m 2021-10-16T14:55:52.31
IV.SSFR.HNN. ML:2.2 0.00032653505 0.0384 AML other m 2021-10-16T14:55:52.56
IV.SSFR.HNE. ML:2.3 0.00042533325 0.064 AML other m 2021-10-16T14:55:52.62
IV.SSFR.HHN. ML:1.7 9.131105E-5 0.064 AML other m 2021-10-16T14:55:52.73
IV.CESI.HHE. ML:0.4 2.655523605E-5 0.1792 AML other m 2021-10-16T14:55:45.48
IV.CESI.HHN. ML:0.4 2.5046695E-5 0.2816 AML other m 2021-10-16T14:55:46.91
IV.CESI.HNE. ML:1.1 0.0001326914 0.7936 AML other m 2021-10-16T14:55:44.22
IV.CESI.HNN. ML:1.2 0.00015325945 0.704 AML other m 2021-10-16T14:55:47.15
IV.FDMO.HHE. ML:0.4 2.0497685E-5 0.2304 AML other m 2021-10-16T14:55:45.85
IV.FDMO.HHN. ML:0.5 2.26400345E-5 0.2176 AML other m 2021-10-16T14:55:45.66
IV.CSP1.EHE. ML:1.2 9.701681E-5 1.4208 AML other m 2021-10-16T14:55:53.66
IV.CSP1.EHN. ML:1.3 0.00010811018 1.8816 AML other m 2021-10-16T14:55:45.02
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