Earthquake with magnitude of ML 1.1 on date 27-07-2021 and time 03:55:24 (Italy) in region 2 km W Norcia (PG)

A magnitude ML 1.1 earthquake occured in region: 2 km W Norcia (PG), on

  • 27-07-2021 01:55:24 (UTC)
  • 27-07-2021 03:55:24 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.791, 13.072 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
Norcia PG 2 4957 4957
Cascia PG 9 3217 8174
Preci PG 10 724 8898
Cerreto di Spoleto PG 13 1075 9973
Castelsantangelo sul Nera MC 13 281 10254
Poggiodomo PG 14 117 10371
Visso MC 16 1107 11478
Sellano PG 16 1079 12557
Vallo di Nera PG 17 364 12921
Accumoli RI 18 667 13588
Ussita MC 18 444 14032
Monteleone di Spoleto PG 18 599 14631
Arquata del Tronto AP 19 1178 15809

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km SE of Foligno (57155 inhabitants)
43 Km NE of Terni (111501 inhabitants)
54 Km W of Teramo (54892 inhabitants)
56 Km NW of L'Aquila (69753 inhabitants)
66 Km SE of Perugia (166134 inhabitants)
89 Km E of Viterbo (67173 inhabitants)
92 Km NE of Guidonia Montecelio (88673 inhabitants)
93 Km W of Montesilvano (53738 inhabitants)
95 Km N of Tivoli (56533 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 1.1 2021-07-27
01:55:24
42.791 13.0715 10 2021-07-27
02:11:02
Sala Sismica INGV-Roma 93257071
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-27 01:55:24 ± 0.04
Latitude 42.7910 ± 0.0018
Longitude 13.0715 ± 0.0037
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 93257071

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 300
Semi-minor axis of confidence ellipse (meter) 166
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 99
Circular confidence region, given by single value of horizontal uncertainty (meter) 300
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 58
Number of associated phases, regardless of their use for origin computation 37
Number of defining phases 37
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.05306
Epicentral distance of station farthest from the epicenter (degree) 0.46945
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 19
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 32
Type of magnitude ML
Reference to an origin 93257071
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-27 02:11:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CESX.HHZ. 2021-07-27T01:55:39.24 0.6 undecidable manual S 243 0.4002 50 -0.07 47
IV.TERO.HHZ. 2021-07-27T01:55:39.92 0.6 undecidable manual S 113 0.4254 50 -0.15 46
IV.MOMA.HHZ. 2021-07-27T01:55:39.11 0.6 undecidable manual S 272 0.3678 50 0.75 39
IV.ASSB.HHZ. 2021-07-27T01:55:39.39 0.6 undecidable manual S 310 0.393 50 0.29 45
IV.MF5.EHZ. 2021-07-27T01:55:38.18 0.6 undecidable manual S 55 0.3453 50 0.48 44
IV.ARRO.EHZ. 2021-07-27T01:55:36.66 0.6 undecidable manual S 227 0.3085 50 0.05 48
IV.RM33.EHZ. 2021-07-27T01:55:36.40 0.6 undecidable manual S 160 0.3013 50 0.03 49
IV.CSP1.EHZ. 2021-07-27T01:55:36.76 0.6 undecidable manual S 18 0.3157 50 -0.06 48
IV.MNTT.EHZ. 2021-07-27T01:55:34.42 1.0 undecidable manual P 55 0.4694 50 0.05 23
IV.T1299.HNZ. 2021-07-27T01:55:34.23 0.6 undecidable manual S 135 0.2203 50 0.25 47
IV.CESI.HHZ. 2021-07-27T01:55:34.48 0.6 undecidable manual S 330 0.2464 50 -0.27 47
IV.SMA1.EHZ. 2021-07-27T01:55:34.74 0.6 undecidable manual S 130 0.2518 50 -0.17 48
IV.FDMO.HHZ. 2021-07-27T01:55:34.41 0.6 undecidable manual S 3 0.2455 50 -0.32 46
IV.ASSB.HHZ. 2021-07-27T01:55:33.01 1.0 undecidable manual P 310 0.393 50 -0.05 24
IV.CESX.HHZ. 2021-07-27T01:55:33.10 0.1 undecidable manual P 243 0.4002 50 -0.08 94
IT.MTCL.HGE. 2021-07-27T01:55:33.08 0.6 undecidable manual S 345 0.2095 114 -0.54 44
IV.TERO.HHZ. 2021-07-27T01:55:33.21 1.0 undecidable manual P 113 0.4254 50 -0.41 22
IV.MOMA.HHZ. 2021-07-27T01:55:32.99 0.6 undecidable manual P 272 0.3678 50 0.36 45
IV.GAVE.EHZ. 2021-07-27T01:55:32.13 0.6 undecidable manual S 233 0.1637 119 0.1 49
IV.LNSS.HHZ. 2021-07-27T01:55:32.77 0.6 undecidable manual S 187 0.1898 116 -0.15 48
IV.MF5.EHZ. 2021-07-27T01:55:32.47 0.1 undecidable manual P 55 0.3453 50 0.22 93
IV.FEMA.HNE. 2021-07-27T01:55:32.40 0.6 undecidable manual S 355 0.1718 118 0.09 49
IV.RM33.EHZ. 2021-07-27T01:55:31.31 1.0 undecidable manual P 160 0.3013 50 -0.17 24
IV.CSP1.EHZ. 2021-07-27T01:55:31.63 1.0 negative manual P 18 0.3157 50 -0.12 24
IV.MC2.EHE. 2021-07-27T01:55:31.75 0.3 undecidable manual S 36 0.1475 122 0.23 72
IV.ARRO.EHZ. 2021-07-27T01:55:31.57 0.1 undecidable manual P 227 0.3085 50 -0.05 97
IV.FDMO.HHZ. 2021-07-27T01:55:30.35 0.3 positive manual P 3 0.2455 50 -0.19 71
IV.CESI.HHZ. 2021-07-27T01:55:30.44 0.1 undecidable manual P 330 0.2464 50 -0.11 97
IV.SMA1.EHZ. 2021-07-27T01:55:30.54 0.6 positive manual P 130 0.2518 50 -0.1 48
IV.LNSS.HHZ. 2021-07-27T01:55:29.42 0.1 undecidable manual P 187 0.1898 116 -0.07 98
IV.FEMA.HNE. 2021-07-27T01:55:29.30 0.1 undecidable manual P 355 0.1718 118 0.16 97
IV.T1299.HNZ. 2021-07-27T01:55:29.99 0.1 undecidable manual P 135 0.2203 50 -0.12 97
IV.GAVE.EHZ. 2021-07-27T01:55:29.09 1.0 undecidable manual P 233 0.1637 119 0.11 25
IT.MTCL.HGE. 2021-07-27T01:55:29.62 0.1 undecidable manual P 345 0.2095 114 -0.28 94
IV.NRCA.HHZ. 2021-07-27T01:55:28.92 0.6 undecidable manual S 36 0.0531 150 0.03 51
IV.MC2.EHE. 2021-07-27T01:55:28.76 0.1 undecidable manual P 36 0.1475 122 0.08 99
IV.NRCA.HHZ. 2021-07-27T01:55:27.29 0.1 undecidable manual P 36 0.0531 150 0.12 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHN. ML:1.5 0.000476 1.9 AML other m 2021-07-27T01:55:29.96
IV.NRCA.HNN. ML:1.5 0.0004585 1.9 AML other m 2021-07-27T01:55:29.02
IV.NRCA.HHE. ML:1.5 0.0005005 0.08 AML other m 2021-07-27T01:55:29.13
IV.NRCA.HNE. ML:1.5 0.0004915 0.5 AML other m 2021-07-27T01:55:29.14
IV.GAVE.EHN. ML:1.3 0.000147 0.4 AML other m 2021-07-27T01:55:32.39
IV.LNSS.HHN. ML:1.2 0.00010865 0.18 AML other m 2021-07-27T01:55:33.34
IV.LNSS.HHE. ML:1.1 8.535E-5 0.64 AML other m 2021-07-27T01:55:33.64
IV.GAVE.EHE. ML:1.2 0.00013322975 0.1808 AML other m 2021-07-27T01:55:33.46
IV.CESI.HHE. ML:0.8 2.7760065E-5 0.1792 AML other m 2021-07-27T01:55:35.29
IV.FDMO.HHN. ML:0.9 3.985E-5 0.22 AML other m 2021-07-27T01:55:34.52
IV.CESI.HHN. ML:1.1 6.53E-5 0.34 AML other m 2021-07-27T01:55:34.76
IV.FDMO.HHE. ML:1 4.935E-5 0.12 AML other m 2021-07-27T01:55:34.93
IV.ARRO.EHN. ML:0.7 2.215E-5 0.96 AML other m 2021-07-27T01:55:36.26
IV.RM33.EHN. ML:0.9 3.7E-5 0.64 AML other m 2021-07-27T01:55:36.81
IV.SMA1.EHN. ML:1 5.29E-5 0.8 AML other m 2021-07-27T01:55:37.93
IV.RM33.EHE. ML:1 3.88E-5 1.48 AML other m 2021-07-27T01:55:37.20
IV.SMA1.EHE. ML:1.1 6.64E-5 0.64 AML other m 2021-07-27T01:55:38.00
IV.ARRO.EHE. ML:0.8 2.595964E-5 0.1808 AML other m 2021-07-27T01:55:38.30
IV.MOMA.HHN. ML:0 3.38E-5 0.58 AML other m 2021-07-27T01:55:39.37
IV.MOMA.HHE. ML:0 5.775E-5 0.2 AML other m 2021-07-27T01:55:40.02
IV.GAVE.HNE. ML:1.3 0.00016907055 0.2192 AML other m 2021-07-27T01:55:33.46
IV.RM33.HNE. ML:1.4 0.000119294935 2.0096 AML other m 2021-07-27T01:55:39.27
IV.RM33.HNN. ML:1.4 9.843154E-5 2.2096 AML other m 2021-07-27T01:55:36.29
IV.CSP1.EHE. ML:1.3 7.2631015E-5 0.76 AML other m 2021-07-27T01:55:36.87
IV.CSP1.EHN. ML:1.1 5.4471795E-5 0.2 AML other m 2021-07-27T01:55:38.34
IV.MOMA.HNE. ML:1.5 0.000110087565 1.36 AML other m 2021-07-27T01:55:40.30
IV.ASSB.HHE. ML:0.8 2.2293265E-5 0.3392 AML other m 2021-07-27T01:55:39.90
IV.ASSB.HHN. ML:0.8 2.1851645E-5 0.1008 AML other m 2021-07-27T01:55:41.36
IV.CESX.HHE. ML:0.8 1.797532E-5 0.88 AML other m 2021-07-27T01:55:47.04
IV.CESX.HHN. ML:0.7 1.6544705E-5 0.3392 AML other m 2021-07-27T01:55:43.24
IV.TERO.HHE. ML:1.4 7.428552E-5 0.56 AML other m 2021-07-27T01:55:39.65
IV.TERO.HHN. ML:1 3.143346E-5 0.1392 AML other m 2021-07-27T01:55:40.67
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