Earthquake with magnitude of ML 1.1 on date 11-10-2021 and time 17:13:55 (UTC) in region 3 km NW Sant'Anatolia di Narco (PG)

A magnitude ML 1.1 earthquake occured in region: 3 km NW Sant'Anatolia di Narco (PG), on

  • 11-10-2021 17:13:55 (UTC)
  • 11-10-2021 19:13:55 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.756, 12.825 at 10 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
Sant'Anatolia di Narco PG 3 564 564
Vallo di Nera PG 4 364 928
Scheggino PG 5 461 1389
Spoleto PG 7 38218 39607
Campello sul Clitunno PG 8 2442 42049
Poggiodomo PG 10 117 42166
Cerreto di Spoleto PG 10 1075 43241
Castel Ritaldi PG 15 3278 46519
Trevi PG 15 8469 54988
Ferentillo TR 15 1913 56901
Monteleone di Spoleto PG 16 599 57500
Cascia PG 16 3217 60717
Sellano PG 17 1079 61796
Montefranco TR 18 1276 63072
Polino TR 19 233 63305
Arrone TR 20 2763 66068

Municipalities with at least 50000 inhabitants

An earthquake occurred to
24 Km SE of Foligno (57155 inhabitants)
26 Km NE of Terni (111501 inhabitants)
53 Km SE of Perugia (166134 inhabitants)
65 Km NW of L'Aquila (69753 inhabitants)
70 Km NE of Viterbo (67173 inhabitants)
73 Km W of Teramo (54892 inhabitants)
84 Km N of Guidonia Montecelio (88673 inhabitants)
88 Km N of Tivoli (56533 inhabitants)
100 Km N of Roma (2864731 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 1.1 2021-10-11
17:13:55
42.7563 12.8247 10 2021-10-11
17:22:08
Sala Sismica INGV-Roma 96441871
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-11 17:13:55 ± 0.07
Latitude 42.7563 ± 0.0054
Longitude 12.8247 ± 0.0049
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96441871

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 516
Semi-minor axis of confidence ellipse (meter) 376
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 181
Circular confidence region, given by single value of horizontal uncertainty (meter) 520
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 64
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.3948
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 96441871
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-11 17:22:08
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.FIR.HHZ. 2021-10-11T17:14:40.48 3.0 undecidable manual Sn -0.02 0
IV.PP3.EHZ. 2021-10-11T17:14:18.85 3.0 undecidable manual S 0.21 0
IV.LRP.EHZ. 2021-10-11T17:14:15.52 3.0 positive manual P 2.1 0
IV.FDMO.HHZ. 2021-10-11T17:14:08.21 0.6 undecidable manual S 34 0.3399 50 0.16 63
IV.ASSB.HHZ. 2021-10-11T17:14:07.21 0.3 undecidable manual S 337 0.3112 50 0.02 98
IV.MMUR.HNZ. 2021-10-11T17:14:05.68 3.0 positive manual P -0.42 0
IV.LNSS.HHZ. 2021-10-11T17:14:04.45 0.3 undecidable manual S 134 0.2203 112 0.01 99
IV.NRCA.HHZ. 2021-10-11T17:14:04.51 0.3 undecidable manual S 70 0.2257 112 -0.12 97
IV.MOMA.HHZ. 2021-10-11T17:14:03.39 0.3 undecidable manual S 284 0.1925 115 -0.06 99
IV.MMO1.EHZ. 2021-10-11T17:14:03.63 0.6 undecidable manual P 69 0.3948 50 0.04 64
IV.ARRO.EHZ. 2021-10-11T17:14:03.07 0.3 undecidable manual S 194 0.1826 116 -0.02 100
IV.FDMO.HHZ. 2021-10-11T17:14:02.48 0.3 undecidable manual P 34 0.3399 50 -0.17 94
IV.ASSB.HHZ. 2021-10-11T17:14:02.29 0.3 undecidable manual P 337 0.3112 50 0.13 95
IV.NRCA.HHZ. 2021-10-11T17:14:00.57 0.3 undecidable manual P 70 0.2257 112 -0.1 97
IV.MOMA.HHZ. 2021-10-11T17:14:00.33 0.3 undecidable manual P 284 0.1925 115 0.34 93
IV.GAVE.EHZ. 2021-10-11T17:14:00.35 0.3 undecidable manual S 141 0.0818 137 0.41 94
IV.LNSS.HHZ. 2021-10-11T17:14:00.76 0.3 undecidable manual P 134 0.2203 112 0.2 96
IV.CESX.HHZ. 2021-10-11T17:14:00.39 0.3 undecidable manual P 230 0.2284 111 -0.34 93
IV.ARRO.EHZ. 2021-10-11T17:13:59.81 0.3 undecidable manual P 194 0.1826 116 0.03 100
IV.GAVE.EHZ. 2021-10-11T17:13:57.51 0.3 undecidable manual P 141 0.0818 137 -0.45 93
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GAVE.EHN. ML:1.3 0.000258 0.32 AML other m 2021-10-11T17:14:00.84
IV.GAVE.EHE. ML:1.2 0.000228 1.38 AML other m 2021-10-11T17:14:01.01
IV.MOMA.HHN. ML:1.3 0.0001265 0.38 AML other m 2021-10-11T17:14:03.65
IV.MOMA.HHE. ML:1.4 0.000194 0.16 AML other m 2021-10-11T17:14:03.80
IV.ARRO.EHE. ML:1.2 0.00011665 0.5 AML other m 2021-10-11T17:14:04.26
IV.NRCA.HHE. ML:1.2 0.00010595 0.16 AML other m 2021-10-11T17:14:04.93
IV.ARRO.EHN. ML:1 6.2919095E-5 0.0896 AML other m 2021-10-11T17:14:03.40
IV.NRCA.HHN. ML:1.1 7.7E-5 0.58 AML other m 2021-10-11T17:14:05.99
IV.LNSS.HHE. ML:1 5.477406105E-5 0.1024 AML other m 2021-10-11T17:14:05.16
IV.LNSS.HHN. ML:1 6.5233745E-5 0.1536 AML other m 2021-10-11T17:14:04.75
IV.ASSB.HHE. ML:0.9 3.0987805E-5 0.1664 AML other m 2021-10-11T17:14:07.73
IV.ASSB.HHN. ML:1 4.6005265E-5 1.5104 AML other m 2021-10-11T17:14:01.52
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