Earthquake with magnitude of ML 1.5 on date 01-10-2021 and time 02:55:21 (Italy) in region 7 km SE Norcia (PG)

A magnitude ML 1.5 earthquake occured in region: 7 km SE Norcia (PG), on

  • 01-10-2021 00:55:21 (UTC)
  • 01-10-2021 02:55:21 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7380, 13.1190 at 9 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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 7 4957 4957
Cascia PG 9 3217 8174
Accumoli RI 12 667 8841
Cittareale RI 14 482 9323
Arquata del Tronto AP 15 1178 10501
Poggiodomo PG 15 117 10618
Monteleone di Spoleto PG 17 599 11217
Preci PG 17 724 11941
Castelsantangelo sul Nera MC 18 281 12222
Amatrice RI 18 2657 14879
Cerreto di Spoleto PG 19 1075 15954

Municipalities with at least 50000 inhabitants

An earthquake occurred to
42 Km SE of Foligno (57155 inhabitants)
43 Km E of Terni (111501 inhabitants)
49 Km NW of L'Aquila (69753 inhabitants)
49 Km W of Teramo (54892 inhabitants)
72 Km SE of Perugia (166134 inhabitants)
88 Km W of Montesilvano (53738 inhabitants)
88 Km NE of Guidonia Montecelio (88673 inhabitants)
90 Km N of Tivoli (56533 inhabitants)
90 Km E of Viterbo (67173 inhabitants)
95 Km W of Pescara (121014 inhabitants)
96 Km W of Chieti (51815 inhabitants)
Recent and historical seismicity

These maps show the seismic activity in different time intervals, before the seismic event to which they refer. Data reported in the first two maps come from the analysis carried out in real time by the personnel of the INGV Operating Rooms, immediately after each earthquake. The third map shows data from 1985 to the date of the earthquake: the locations are reviewed by the seismological analysts of the INGV Italian Seismic Bulletin (Bollettino Sismico Italiano dell’INGV). The localization parameters (hypocentral coordinates and magnitude) are the best possible estimate with the data available to the INGV, but are constantly updated according to further data that become available. The location and magnitude parameters, subsequently reviewed by seismological analysts, may vary.

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 0.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 72 hours preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 2.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 90 days preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event

This map shows the earthquake epicenters with magnitude ≥ 3.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, from 1985 to the date of this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version 3.0, https://doi.org/10.13127/cpti/cpti15.3) since 1000 AD until 2019. The size of the square indicates the different classes of magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The black and white star is the epicenter of the current earthquake.
Seismic hazard

Seismic hazard maps provide probabilistic estimates of the earthquake ground shaking exceeding a given threshold in a given geographic region within a given time window. Thus, it is not a deterministic prediction - a target that may be never reached given the complexity of the earthquake physical phenomenon - nor of the maximum expected earthquake since this has extremely low probabilities to occur.

In 2004, it was published the seismic hazard map of Italy (http://zonesismiche.mi.ingv.it) that provides a picture of the most hazardous geographic regions. The seismic hazard map of Italy (GdL MPS, 2004; rif. Ordinanza PCM del 28 aprile 2006, n. 3519, All. 1b) provides the 10% probability of exceedance in 50 years of the horizontal acceleration at rock sites (i.e., Vs30>800 m/s; cat. A, 3.2.1 of the D.M. 14.09.2005).

The colours indicate the various values of the ground acceleration that have 10% to be exceeded within 50 years. In general, the colours associated to low values of acceleration refer to areas that are less hazardous and stronger earthquakes repeat less frequently although they may still occur.

Seismic hazard map

Seismic hazard map

This map shows the seismic hazard map of Italy for the region where the earthquake occurred.
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
ML 1.5 2021-10-01
00:55:21
42.7375 13.1192 9 2022-03-30
13:04:19
Bollettino Sismico Italiano INGV 97973811
Reviewed
Rev100
ML 1.5 2021-10-01
00:55:21
42.7393 13.12 9 2021-10-01
01:05:11
Sala Sismica INGV-Roma 96082961
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-01 00:55:21 ± 0.05
Latitude 42.7375 ± 0.0027
Longitude 13.1192 ± 0.0049
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 97973811

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 341
Semi-minor axis of confidence ellipse (meter) 302
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 239
Circular confidence region, given by single value of horizontal uncertainty (meter) 340.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 40
Number of associated phases, regardless of their use for origin computation 53
Number of defining phases 46
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.64032
Number of stations at which the event was observed 32
Number of stations from which data was used for origin computation 25
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 31
Type of magnitude ML
Reference to an origin 97973811
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-11-30 14:02:35

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 31
Type of magnitude ML
Reference to an origin 96082961
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-01 01:05:11
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CDRU.HHZ. 2021-10-01T00:56:45.19 3.0 undecidable manual Sg 12.09 0
IX.PGN3.HHZ.02 2021-10-01T00:56:42.83 3.0 undecidable manual Sg 5.64 0
IX.SNR3.EHZ.02 2021-10-01T00:56:29.01 3.0 undecidable manual Sn 2 0
IX.MNT3.EHZ.02 2021-10-01T00:56:23.41 3.0 undecidable manual Sn 0.42 0
TV.SF04.EHZ. 2021-10-01T00:55:55.47 3.0 undecidable manual S -2.08 0
IV.FIR.HHZ. 2021-10-01T00:55:49.31 3.0 undecidable manual Pn -0.44 0
IV.ARVD.HHZ. 2021-10-01T00:55:48.64 3.0 undecidable manual S -1.2 0
IV.CING.HHZ. 2021-10-01T00:55:44.08 0.6 undecidable manual S 5 0.6403 50 0.73 37
IV.EL6.EHZ. 2021-10-01T00:55:42.51 0.3 undecidable manual S 359 0.5918 50 0.6 59
IV.ATCC.EHZ. 2021-10-01T00:55:41.89 0.6 undecidable manual S 322 0.5684 50 0.67 39
IV.SNTG.HHZ. 2021-10-01T00:55:40.60 0.3 undecidable manual S 346 0.5333 50 0.41 63
IV.MOMA.HHZ. 2021-10-01T00:55:36.86 0.3 undecidable manual S 280 0.4083 50 0.38 66
IV.GUMA.HHZ. 2021-10-01T00:55:35.31 0.3 undecidable manual S 26 0.3615 50 0.22 69
IV.MF5.EHZ. 2021-10-01T00:55:35.76 0.6 undecidable manual S 45 0.3534 50 0.91 36
IV.MML1.EHZ. 2021-10-01T00:55:35.90 0.3 undecidable manual S 344 0.3912 50 -0.07 70
IV.TERO.HNZ. 2021-10-01T00:55:34.96 0.3 undecidable manual S 108 0.3741 50 -0.51 64
IV.CSP1.EHZ. 2021-10-01T00:55:34.90 0.1 undecidable manual S 10 0.3597 50 -0.14 93
IV.EL6.EHZ. 2021-10-01T00:55:33.11 0.1 undecidable manual P 359 0.5918 50 -0.15 88
IV.CING.HHZ. 2021-10-01T00:55:33.99 0.3 undecidable manual P 5 0.6403 50 -0.1 66
IV.CESI.HHZ. 2021-10-01T00:55:33.31 0.3 undecidable manual S 330 0.3103 50 -0.26 69
IV.MNTT.EHZ. 2021-10-01T00:55:32.08 0.3 undecidable manual P 47 0.4766 50 0.79 56
IV.SNTG.HHZ. 2021-10-01T00:55:32.35 0.3 undecidable manual P 346 0.5333 50 0.08 68
IV.FDMO.HHZ. 2021-10-01T00:55:32.71 0.6 undecidable manual S 356 0.2995 50 -0.56 43
IV.ATCC.EHZ. 2021-10-01T00:55:32.87 0.3 undecidable manual P 322 0.5684 50 0.01 69
IV.MMO1.EHZ. 2021-10-01T00:55:30.21 0.1 undecidable manual S 43 0.2221 110 -0.33 92
IV.ASSB.HHZ. 2021-10-01T00:55:30.76 0.3 undecidable manual P 312 0.4542 50 -0.16 68
IV.RM33.EHZ. 2021-10-01T00:55:30.83 0.1 undecidable manual S 163 0.2392 109 -0.32 92
IV.MOMA.HHZ. 2021-10-01T00:55:30.08 0.1 undecidable manual P 280 0.4083 50 -0.05 94
IV.CESX.HHZ. 2021-10-01T00:55:30.23 0.6 undecidable manual P 252 0.4119 50 0.04 47
IV.MTRA.EHZ. 2021-10-01T00:55:29.77 0.1 undecidable manual S 85 0.2041 111 -0.13 96
IV.MF5.EHZ. 2021-10-01T00:55:29.36 0.3 positive manual P 45 0.3534 50 0.17 69
IV.CSP1.EHZ. 2021-10-01T00:55:29.00 0.1 undecidable manual P 10 0.3597 50 -0.29 90
IV.MML1.EHZ. 2021-10-01T00:55:29.66 0.1 undecidable manual P 344 0.3912 50 -0.17 92
IV.TERO.HNZ. 2021-10-01T00:55:29.14 0.3 undecidable manual P 108 0.3741 50 -0.4 66
IV.MC2.EHZ. 2021-10-01T00:55:29.58 0.1 undecidable manual S 16 0.1808 114 0.51 89
IV.SMA1.EHZ. 2021-10-01T00:55:29.94 0.3 undecidable manual S 124 0.1916 113 0.5 67
IV.GUMA.HHZ. 2021-10-01T00:55:29.34 0.3 positive manual P 26 0.3615 50 0.01 71
IV.CESI.HHZ. 2021-10-01T00:55:28.18 0.1 undecidable manual P 330 0.3103 50 -0.27 91
IV.LNSS.HHZ. 2021-10-01T00:55:28.03 0.1 undecidable manual S 203 0.1466 119 0.15 96
IV.GAVE.EHZ. 2021-10-01T00:55:28.95 0.6 undecidable manual S 255 0.1709 115 0.22 47
IV.ARRO.EHZ. 2021-10-01T00:55:28.04 0.1 undecidable manual P 239 0.3040 50 -0.31 91
IV.T1299.HNN. 2021-10-01T00:55:28.66 0.1 undecidable manual S 131 0.1583 117 0.39 92
IV.FDMO.HHZ. 2021-10-01T00:55:27.89 0.1 positive manual P 356 0.2995 50 -0.38 89
IV.SMA1.EHZ. 2021-10-01T00:55:26.20 0.1 undecidable manual P 124 0.1916 113 0.14 96
IV.MTRA.EHZ. 2021-10-01T00:55:26.25 0.1 positive manual P 85 0.2041 111 -0.08 97
IV.MMO1.EHZ. 2021-10-01T00:55:26.44 0.1 positive manual P 43 0.2221 110 -0.25 93
IV.RM33.EHZ. 2021-10-01T00:55:26.79 0.1 positive manual P 163 0.2392 109 -0.26 93
IV.T1299.HNN. 2021-10-01T00:55:25.65 0.1 undecidable manual P 131 0.1583 117 0.26 94
IV.LNSS.HHZ. 2021-10-01T00:55:25.27 0.1 positive manual P 203 0.1466 119 0.11 97
IV.GAVE.EHZ. 2021-10-01T00:55:25.74 0.1 positive manual P 255 0.1709 115 0.09 97
IV.NRCA.HNZ. 2021-10-01T00:55:25.87 0.1 undecidable manual S 358 0.0962 130 -0.39 93
IV.MC2.EHZ. 2021-10-01T00:55:25.84 0.1 undecidable manual P 16 0.1808 114 -0.01 99
IV.NRCA.HNZ. 2021-10-01T00:55:24.20 0.1 positive manual P 358 0.0962 130 -0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNE. ML:2.0 0.00127 0.08 AML other m 2021-10-01T00:55:26.50
IV.NRCA.HHE. ML:2.0 0.0014 0.08 AML other m 2021-10-01T00:55:26.50
IV.NRCA.HHN. ML:1.8 0.000843 0.34 AML other m 2021-10-01T00:55:26.56
IV.NRCA.HNN. ML:1.7 0.0007050000000000001 0.34 AML other m 2021-10-01T00:55:26.69
IV.LNSS.HHE. ML:1.6 0.0003965 0.12 AML other m 2021-10-01T00:55:29.00
IV.MTRA.EHN. ML:1.6 0.000246 0.86 AML other m 2021-10-01T00:55:29.93
IV.LNSS.HHN. ML:1.6 0.00033350000000000003 0.72 AML other m 2021-10-01T00:55:30.40
IV.MTRA.HNE. ML:1.6 0.00027049999999999996 0.26 AML other m 2021-10-01T00:55:30.21
IV.GAVE.EHN. ML:1.6 0.00034399999999999996 0.16 AML other m 2021-10-01T00:55:30.15
IV.MTRA.HNN. ML:1.6 0.000236 0.28 AML other m 2021-10-01T00:55:30.21
IV.SMA1.EHN. ML:1.6 0.000266 0.92 AML other m 2021-10-01T00:55:30.09
IV.SMA1.EHE. ML:1.5 0.0002415 0.86 AML other m 2021-10-01T00:55:30.15
IV.GAVE.EHE. ML:1.6 0.0003045 1.06 AML other m 2021-10-01T00:55:30.83
IV.MTRA.EHE. ML:1.6 0.000275 0.18 AML other m 2021-10-01T00:55:31.10
IV.RM33.EHE. ML:1.2 0.0000954 1.02 AML other m 2021-10-01T00:55:31.82
IV.RM33.EHN. ML:1.2 0.00009554999999999999 0.5 AML other m 2021-10-01T00:55:32.15
IV.FDMO.HHE. ML:1.2 0.0000766 0.64 AML other m 2021-10-01T00:55:34.95
IV.FDMO.HHN. ML:1.2 0.0000722 0.96 AML other m 2021-10-01T00:55:34.81
IV.ARRO.EHN. ML:1.3 0.0000818 0.84 AML other m 2021-10-01T00:55:34.48
IV.CSP1.EHN. ML:1.7 0.00019 0.32 AML other m 2021-10-01T00:55:35.31
IV.ARRO.EHE. ML:1.3 0.0000819 0.2 AML other m 2021-10-01T00:55:35.38
IV.CSP1.EHE. ML:2.0 0.0003155 1 AML other m 2021-10-01T00:55:35.48
IV.MML1.EHN. ML:1.3 0.000057900000000000005 0.88 AML other m 2021-10-01T00:55:36.65
IV.GUMA.HHE. ML:1.7 0.00017749999999999998 0.2 AML other m 2021-10-01T00:55:36.53
IV.GUMA.HHN. ML:1.6 0.000143 0.42 AML other m 2021-10-01T00:55:36.83
IV.MML1.EHE. ML:1.3 0.00006105 0.48 AML other m 2021-10-01T00:55:37.55
IV.MOMA.HHN. ML:1.4 0.00007149999999999999 1.28 AML other m 2021-10-01T00:55:37.99
IV.ASSB.HHE. ML:1.2 0.00003875 1.32 AML other m 2021-10-01T00:55:38.29
IV.MOMA.HHE. ML:1.3 0.00006565 0.44 AML other m 2021-10-01T00:55:39.02
IV.CESX.HHE. ML:1.2 0.00004765 0.7 AML other m 2021-10-01T00:55:40.00
IV.ASSB.HHN. ML:1.3 0.00004955 0.8 AML other m 2021-10-01T00:55:40.43
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions

The map reports the fault plane solutions for earthquakes in the region from 1977 to the date of this event. Red moment tensors are determined using the Regional Centroid Moment Tensor technique (RCMT, http://www.bo.ingv.it/RCMT) applied for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when a station azimuthal coverage exists RCMTs can be obtained also for earthquakes with magnitude down to 4.0. The gray moment tensors are obtained with the Time Domain Moment Tensor method (TDMT, http://terremoti.ingv.it/tdmt). This technique is applied to earthquakes with magnitude ML greater than 3.2, when it is possible. The size of symbols scales with the calculated moment magnitude Mw.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download