Earthquake with magnitude of ML 0.9 on date 03-11-2021 and time 09:39:45 (Italy) in region 1 km S Norcia (PG)

A magnitude ML 0.9 earthquake occured in region: 1 km S Norcia (PG), on

  • 03-11-2021 08:39:45 (UTC)
  • 03-11-2021 09:39:45 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.783, 13.093 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
Norcia PG 1 4957 4957
Cascia PG 10 3217 8174
Preci PG 12 724 8898
Castelsantangelo sul Nera MC 13 281 9179
Cerreto di Spoleto PG 15 1075 10254
Poggiodomo PG 15 117 10371
Accumoli RI 16 667 11038
Visso MC 17 1107 12145
Arquata del Tronto AP 17 1178 13323
Sellano PG 18 1079 14402
Ussita MC 18 444 14846
Monteleone di Spoleto PG 19 599 15445
Vallo di Nera PG 19 364 15809
Cittareale RI 19 482 16291

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km SE of Foligno (57155 inhabitants)
44 Km NE of Terni (111501 inhabitants)
52 Km W of Teramo (54892 inhabitants)
54 Km NW of L'Aquila (69753 inhabitants)
68 Km SE of Perugia (166134 inhabitants)
90 Km E of Viterbo (67173 inhabitants)
92 Km W of Montesilvano (53738 inhabitants)
92 Km NE of Guidonia Montecelio (88673 inhabitants)
94 Km N of Tivoli (56533 inhabitants)
98 Km W of Pescara (121014 inhabitants)
99 Km SW of Ancona (100861 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 0.9 2021-11-03
08:39:45
42.7833 13.0932 11 2021-11-03
08:44:28
Sala Sismica INGV-Roma 97188021
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-03 08:39:45 ± 0.31
Latitude 42.7833 ± 0.0216
Longitude 13.0932 ± 0.0441
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 97188021

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 4287
Semi-minor axis of confidence ellipse (meter) 703
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 123
Circular confidence region, given by single value of horizontal uncertainty (meter) 4290
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 209
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.32
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.31926
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 5
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 97188021
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-03 08:44:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MMUR.HNZ. 2021-11-03T08:40:01.21 3.0 undecidable manual P 2.01 0
IV.CSP1.EHZ. 2021-11-03T08:39:57.99 0.3 undecidable manual S 15 0.3193 50 0.17 71
IV.FOSV.EHZ. 2021-11-03T08:39:57.63 3.0 undecidable manual P 0.34 0
IV.FDMO.HHZ. 2021-11-03T08:39:55.64 0.3 undecidable manual S 359 0.2527 50 -0.22 72
IV.MF5.EHZ. 2021-11-03T08:39:54.17 3.0 negative manual P 0.1 0
IV.GAVE.EHZ. 2021-11-03T08:39:53.47 0.3 undecidable manual S 238 0.1718 119 0.02 76
IV.MC2.EHZ. 2021-11-03T08:39:52.96 0.3 undecidable manual S 29 0.1457 124 0.37 71
IV.CSP1.EHZ. 2021-11-03T08:39:52.91 0.1 undecidable manual P 15 0.3193 50 0.16 95
IV.FDMO.HHZ. 2021-11-03T08:39:51.60 0.1 undecidable manual P 359 0.2527 50 -0.03 100
IV.GAVE.EHZ. 2021-11-03T08:39:50.30 0.1 undecidable manual P 238 0.1718 119 0.07 100
IV.NRCA.HHZ. 2021-11-03T08:39:50.10 0.3 undecidable manual S 17 0.0522 152 0.01 78
IV.MC2.EHZ. 2021-11-03T08:39:49.04 0.1 undecidable manual P 29 0.1457 124 -0.7 85
IV.NRCA.HHZ. 2021-11-03T08:39:48.50 0.3 undecidable manual P 17 0.0522 152 0.21 75
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:1 0.0001565 0.1 AML other m 2021-11-03T08:39:50.23
IV.NRCA.HHN. ML:0.8 8.595E-5 0.08 AML other m 2021-11-03T08:39:51.33
IV.GAVE.EHE. ML:0.8 4.7374275E-5 0.1792 AML other m 2021-11-03T08:39:54.32
IV.GAVE.EHN. ML:0.7 3.664091E-5 0.2816 AML other m 2021-11-03T08:39:53.89
IV.NRCA.HNE. ML:1 0.0001563682526 0.1408 AML other m 2021-11-03T08:39:50.22
IV.NRCA.HNN. ML:1.2 0.0002194963 0.5824 AML other m 2021-11-03T08:39:53.86
IV.GAVE.HNE. ML:1 6.899526E-5 0.576 AML other m 2021-11-03T08:39:50.69
IV.GAVE.HNN. ML:1.3 0.00015160205 0.7168 AML other m 2021-11-03T08:40:01.52
IV.FDMO.HHE. ML:0.6 2.1231275E-5 0.1408 AML other m 2021-11-03T08:39:56.18
IV.FDMO.HHN. ML:0.6 2.092367E-5 0.1408 AML other m 2021-11-03T08:39:56.31
IV.CSP1.EHE. ML:1 3.9104648E-5 1.1008 AML other m 2021-11-03T08:40:09.79
IV.CSP1.EHN. ML:1.1 5.5207785E-5 0.96 AML other m 2021-11-03T08:40:04.04
IV.MF5.EHE. ML:1 3.742962E-5 0.736 AML other m 2021-11-03T08:40:10.63
IV.MF5.EHN. ML:1 3.4393905E-5 0.7424 AML other m 2021-11-03T08:39:53.86
IV.FOSV.EHE. ML:0.7 1.19108005E-5 0.0832 AML other m 2021-11-03T08:39:58.86
IV.FOSV.EHN. ML:0.9 1.348031E-5 0.6592 AML other m 2021-11-03T08:40:22.90
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