Earthquake with magnitude of ML 1.2 on date 16-10-2021 and time 01:03:06 (UTC) in region 3 km W Norcia (PG)

A magnitude ML 1.2 earthquake occured in region: 3 km W Norcia (PG), on

  • 16-10-2021 01:03:06 (UTC)
  • 16-10-2021 03:03:06 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.803, 13.059 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 3 4957 4957
Preci PG 9 724 5681
Cascia PG 10 3217 8898
Cerreto di Spoleto PG 12 1075 9973
Castelsantangelo sul Nera MC 13 281 10254
Poggiodomo PG 14 117 10371
Sellano PG 14 1079 11450
Visso MC 15 1107 12557
Vallo di Nera PG 16 364 12921
Ussita MC 17 444 13365
Monteleone di Spoleto PG 19 599 13964
Accumoli RI 20 667 14631
Sant'Anatolia di Narco PG 20 564 15195
Arquata del Tronto AP 20 1178 16373

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km SE of Foligno (57155 inhabitants)
43 Km NE of Terni (111501 inhabitants)
55 Km W of Teramo (54892 inhabitants)
57 Km NW of L'Aquila (69753 inhabitants)
64 Km SE of Perugia (166134 inhabitants)
89 Km E of Viterbo (67173 inhabitants)
93 Km N of Guidonia Montecelio (88673 inhabitants)
95 Km W of Montesilvano (53738 inhabitants)
96 Km N of Tivoli (56533 inhabitants)
98 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 1.2 2021-10-16
01:03:06
42.8028 13.0588 11 2021-10-16
03:13:16
Sala Sismica INGV-Roma 96633141
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-16 01:03:06 ± 0.07
Latitude 42.8028 ± 0.0027
Longitude 13.0588 ± 0.0061
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96633141

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 512
Semi-minor axis of confidence ellipse (meter) 300
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 89
Circular confidence region, given by single value of horizontal uncertainty (meter) 510
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 103
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.23472
Number of stations at which the event was observed 11
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 4
Type of magnitude ML
Reference to an origin 96633141
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-16 03:13:16
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.T1299.HNZ. 2021-10-16T01:03:16.09 0.3 undecidable manual S 136 0.2347 50 0.41 67
IV.CESI.HHZ. 2021-10-16T01:03:15.63 0.3 undecidable manual S 331 0.2311 50 0.06 73
IV.MMO1.EHZ. 2021-10-16T01:03:15.11 0.3 undecidable manual S 64 0.2185 50 -0.08 72
IV.FDMO.HHZ. 2021-10-16T01:03:15.72 0.1 undecidable manual S 5 0.2347 50 0.06 97
IV.LNSS.HHZ. 2021-10-16T01:03:14.38 0.1 undecidable manual S 184 0.2005 50 -0.26 93
IT.MTCL.HGZ. 2021-10-16T01:03:14.55 0.1 undecidable manual S 347 0.1961 50 0.04 98
IV.GAVE.EHZ. 2021-10-16T01:03:13.76 0.3 undecidable manual S 228 0.1637 50 0.2 71
IV.SMA1.EHZ. 2021-10-16T01:03:13.10 3.0 undecidable manual P 0
IV.MC2.EHZ. 2021-10-16T01:03:13.17 0.3 undecidable manual S 41 0.1448 124 0.21 72
IV.CSP1.EHZ. 2021-10-16T01:03:12.36 3.0 negative manual P -0.85 0
IV.FDMO.HHZ. 2021-10-16T01:03:11.72 0.1 undecidable manual P 5 0.2347 50 0.05 97
IV.CESI.HHZ. 2021-10-16T01:03:11.73 0.1 undecidable manual P 331 0.2311 50 0.11 96
IV.MMO1.EHZ. 2021-10-16T01:03:11.15 0.1 undecidable manual P 64 0.2185 50 -0.25 93
IV.T1299.HNZ. 2021-10-16T01:03:11.77 0.1 undecidable manual P 136 0.2347 50 0.09 96
IV.MC2.EHZ. 2021-10-16T01:03:10.21 0.1 undecidable manual P 41 0.1448 124 0.1 98
IT.MTCL.HGZ. 2021-10-16T01:03:10.43 0.3 undecidable manual P 347 0.1961 50 -0.58 65
IV.GAVE.EHZ. 2021-10-16T01:03:10.59 0.1 undecidable manual P 228 0.1637 50 0.13 97
IV.NRCA.HHZ. 2021-10-16T01:03:10.34 0.1 undecidable manual S 53 0.0513 153 -0.16 98
IV.LNSS.HHZ. 2021-10-16T01:03:10.91 0.1 undecidable manual P 184 0.2005 50 -0.17 95
IV.NRCA.HHZ. 2021-10-16T01:03:08.76 0.1 undecidable manual P 53 0.0513 153 0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.5 0.000539 0.08 AML other m 2021-10-16T01:03:10.37
IV.NRCA.HHE. ML:1.6 0.0006865 0.1 AML other m 2021-10-16T01:03:10.49
IV.GAVE.EHN. ML:1.3 0.000151 0.18 AML other m 2021-10-16T01:03:14.03
IV.GAVE.EHE. ML:1.2 0.00013604025 0.4 AML other m 2021-10-16T01:03:13.81
IV.LNSS.HHE. ML:1 5.8274095E-5 0.34 AML other m 2021-10-16T01:03:14.57
IV.LNSS.HHN. ML:1.1 8.263316E-5 0.14 AML other m 2021-10-16T01:03:14.85
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