Earthquake with magnitude of ML 2.0 on date 23-08-2020 and time 21:20:30 (Italy) in region 4 km E Norcia (PG)

A magnitude ML 2.0 earthquake occured in region: 4 km E Norcia (PG), on

  • 23-08-2020 19:20:30 (UTC)
  • 23-08-2020 21:20:30 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7820, 13.1340 at 7 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 4 4957 4957
Cascia PG 12 3217 8174
Castelsantangelo sul Nera MC 13 281 8455
Accumoli RI 13 667 9122
Arquata del Tronto AP 13 1178 10300
Preci PG 13 724 11024
Visso MC 17 1107 12131
Montegallo AP 18 523 12654
Poggiodomo PG 18 117 12771
Cerreto di Spoleto PG 18 1075 13846
Cittareale RI 18 482 14328
Ussita MC 18 444 14772

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km E of Foligno (57155 inhabitants)
47 Km NE of Terni (111501 inhabitants)
49 Km W of Teramo (54892 inhabitants)
52 Km NW of L'Aquila (69753 inhabitants)
71 Km SE of Perugia (166134 inhabitants)
88 Km W of Montesilvano (53738 inhabitants)
93 Km NE of Guidonia Montecelio (88673 inhabitants)
93 Km E of Viterbo (67173 inhabitants)
95 Km N of Tivoli (56533 inhabitants)
95 Km W of Pescara (121014 inhabitants)
97 Km NW of Chieti (51815 inhabitants)
98 Km SW of Ancona (100861 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
ML 2.0 2020-08-23
19:20:30
42.7815 13.1342 7 2020-11-19
12:37:02
Bollettino Sismico Italiano INGV 83002691
Reviewed
Rev100
ML 2.0 2020-08-23
19:20:30
42.7807 13.1387 7 2020-08-23
19:34:44
Sala Sismica INGV-Roma 82272131
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-23 19:20:30 ± 0.06
Latitude 42.7815 ± 0.0027
Longitude 13.1342 ± 0.0049
Depth (km) 7 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 83002691

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 354
Semi-minor axis of confidence ellipse (meter) 126
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 270
Circular confidence region, given by single value of horizontal uncertainty (meter) 350.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 37
Number of associated phases, regardless of their use for origin computation 50
Number of defining phases 50
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.05396
Epicentral distance of station farthest from the epicenter (degree) 0.75993
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 27
Magnitudes information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations 56
Type of magnitude ML
Reference to an origin 83002691
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-11-12 11:42:58

ML:2.0

Field Value
Value 2.0
Uncertainty 0.2
Num. used stations 52
Type of magnitude ML
Reference to an origin 82272131
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-23 19:34:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ARVD.HHZ. 2020-08-23T19:20:55.79 0.6 undecidable manual S 349 81.0522 50 0.69 37
IV.VCEL.EHZ. 2020-08-23T19:20:53.58 0.6 undecidable manual S 126 71.8725 50 0.91 34
IV.FOSV.EHZ. 2020-08-23T19:20:50.86 0.6 undecidable manual S 332 64.491 50 0.17 44
IV.EL6.EHZ. 2020-08-23T19:20:49.92 0.6 undecidable manual S 358 60.7947 50 0.21 44
IV.ATCC.EHZ. 2020-08-23T19:20:49.84 0.6 undecidable manual S 318 60.0954 50 0.32 43
IV.MNTT.EHZ. 2020-08-23T19:20:48.15 0.6 undecidable manual S 50 48.7179 50 1.66 24
IV.FIAM.HHZ. 2020-08-23T19:20:48.58 0.6 undecidable manual S 181 56.9985 50 -0.11 45
IV.ASSB.HHZ. 2020-08-23T19:20:46.31 0.6 undecidable manual S 307 48.3183 50 -0.05 46
IV.SAP2.EHZ. 2020-08-23T19:20:45.07 0.6 undecidable manual S 32 41.0256 50 0.63 41
IV.MGAB.HHZ. 2020-08-23T19:20:45.21 0.3 undecidable manual P 280 84.3489 50 0.16 64
IV.ARVD.HHZ. 2020-08-23T19:20:44.44 0.3 undecidable manual P 349 81.0522 50 -0.09 65
IV.ARRO.EHZ. 2020-08-23T19:20:43.87 0.6 undecidable manual S 233 37.5291 100 0.54 42
IV.MURB.HHZ. 2020-08-23T19:20:43.04 0.3 undecidable manual P 317 72.7716 50 -0.22 64
IV.TERO.HHZ. 2020-08-23T19:20:43.74 0.6 undecidable manual S 115 42.1245 50 -0.99 35
IV.MF5.EHZ. 2020-08-23T19:20:42.82 0.6 undecidable manual S 49 35.0427 101 0.35 45
IV.VCEL.EHZ. 2020-08-23T19:20:42.95 0.3 undecidable manual P 126 71.8725 50 -0.18 65
IV.GUMA.HHZ. 2020-08-23T19:20:42.66 0.6 undecidable manual S 28 35.2425 101 0.11 47
IV.FAGN.HHZ. 2020-08-23T19:20:42.41 0.6 undecidable manual P 147 67.9764 50 -0.12 44
IV.ATCC.EHZ. 2020-08-23T19:20:41.01 0.1 positive manual P 318 60.0954 50 -0.3 86
IV.FOSV.EHZ. 2020-08-23T19:20:41.68 0.3 undecidable manual P 332 64.491 50 -0.31 64
IV.CESI.HHZ. 2020-08-23T19:20:41.15 0.6 undecidable manual S 323 31.0467 103 0.03 48
IV.EL6.EHZ. 2020-08-23T19:20:41.06 0.1 undecidable manual P 358 60.7947 50 -0.36 85
IV.FDMO.HHZ. 2020-08-23T19:20:40.03 0.6 undecidable manual S 352 28.5492 104 -0.25 46
IV.FIAM.HHZ. 2020-08-23T19:20:40.34 0.3 undecidable manual P 181 56.9985 50 -0.48 62
IV.RM33.EHZ. 2020-08-23T19:20:40.96 0.6 undecidable manual S 168 30.9468 103 -0.13 47
IV.MNTT.EHZ. 2020-08-23T19:20:39.93 0.1 positive manual P 50 48.7179 50 0.37 87
IV.OFFI.HHZ. 2020-08-23T19:20:39.78 0.3 undecidable manual P 69 48.0186 50 0.34 66
IV.ASSB.HHZ. 2020-08-23T19:20:39.02 0.1 positive manual P 307 48.3183 50 -0.47 85
IV.LNSS.HHZ. 2020-08-23T19:20:38.27 0.6 undecidable manual S 201 21.2676 108 0.43 45
IV.GAVE.EHZ. 2020-08-23T19:20:38.60 0.6 undecidable manual S 243 21.9669 107 0.54 44
IV.SMA1.EHZ. 2020-08-23T19:20:38.81 0.6 undecidable manual S 136 23.4543 106 0.24 47
IV.SAP2.EHZ. 2020-08-23T19:20:38.52 0.3 undecidable manual P 32 41.0256 50 0.15 69
IV.MTRA.EHZ. 2020-08-23T19:20:37.99 0.6 undecidable manual S 97 21.5673 108 0.05 49
IV.ARRO.EHZ. 2020-08-23T19:20:37.56 0.3 undecidable manual P 233 37.5291 100 -0.17 69
IV.MF5.EHZ. 2020-08-23T19:20:37.28 0.1 undecidable manual P 49 35.0427 101 0.04 95
IV.TERO.HHZ. 2020-08-23T19:20:37.77 0.1 undecidable manual P 115 42.1245 50 -0.77 77
IV.GUMA.HHZ. 2020-08-23T19:20:37.11 0.1 undecidable manual P 28 35.2425 101 -0.17 93
IV.MMO1.EHZ. 2020-08-23T19:20:37.40 0.1 undecidable manual S 50 20.3685 109 -0.17 95
IV.RM33.EHZ. 2020-08-23T19:20:36.19 0.1 negative manual P 168 30.9468 103 -0.25 92
IV.MC2.EHZ. 2020-08-23T19:20:36.19 0.6 undecidable manual S 17 15.0738 115 0.34 46
IV.CESI.HHZ. 2020-08-23T19:20:36.27 0.1 positive manual P 323 31.0467 103 -0.19 93
IV.FDMO.HHZ. 2020-08-23T19:20:35.75 0.1 undecidable manual P 352 28.5492 104 -0.23 93
IV.GAVE.EHZ. 2020-08-23T19:20:35.04 0.1 positive manual P 243 21.9669 107 0.34 91
IV.SMA1.EHZ. 2020-08-23T19:20:35.07 0.1 undecidable manual P 136 23.4543 106 0.08 96
IV.MTRA.EHZ. 2020-08-23T19:20:34.63 0.1 undecidable manual P 97 21.5673 108 0.01 98
IV.MMO1.EHZ. 2020-08-23T19:20:34.24 0.1 positive manual P 50 20.3685 109 -0.17 95
IV.LNSS.HHZ. 2020-08-23T19:20:34.82 0.1 undecidable manual P 201 21.2676 108 0.25 93
IV.MC2.EHZ. 2020-08-23T19:20:33.66 0.1 undecidable manual P 17 15.0738 115 0.24 95
IV.NRCA.HNZ. 2020-08-23T19:20:32.93 0.3 undecidable manual S 344 5.994 139 -0.34 71
IV.NRCA.HNZ. 2020-08-23T19:20:31.97 0.1 positive manual P 344 5.994 139 0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.HNN. ML:2.2 0.0011683445 0.5504 AML other m 2020-08-23T19:20:38.99
IV.MTRA.EHN. ML:2.2 0.00121 0.54 AML other m 2020-08-23T19:20:39.00
IV.SMA1.EHE. ML:2.0 0.0006935 0.22 AML other m 2020-08-23T19:20:39.19
IV.GAVE.HNN. ML:1.6 0.00030307090000000005 0.2176 AML other m 2020-08-23T19:20:39.37
IV.MTRA.HNE. ML:2.2 0.0011400000000000002 1.36 AML other m 2020-08-23T19:20:39.09
IV.LNSS.HHN. ML:2.0 0.000815 1.36 AML other m 2020-08-23T19:20:39.87
IV.LNSS.HNN. ML:1.9 0.00067034515 0.1792 AML other m 2020-08-23T19:20:39.88
IV.LNSS.HHE. ML:2.1 0.0009965 1.62 AML other m 2020-08-23T19:20:39.11
IV.MTRA.EHE. ML:2.2 0.00113 0.28 AML other m 2020-08-23T19:20:40.10
IV.LNSS.HNE. ML:2.0 0.00072328525 0.256 AML other m 2020-08-23T19:20:40.12
IV.GAVE.EHE. ML:2.2 0.0011860380500000002 0.1792 AML other m 2020-08-23T19:20:40.49
IV.GAVE.HNE. ML:2.2 0.0011674305 0.1792 AML other m 2020-08-23T19:20:40.49
IV.GAVE.EHN. ML:2.2 0.001008 0.44 AML other m 2020-08-23T19:20:41.11
IV.RM33.HNN. ML:1.9 0.0004086069 0.2432 AML other m 2020-08-23T19:20:41.23
IV.FDMO.HHE. ML:1.8 0.000314 1.24 AML other m 2020-08-23T19:20:41.25
IV.FDMO.HHN. ML:1.7 0.00028499425 0.1664 AML other m 2020-08-23T19:20:41.45
IV.RM33.EHN. ML:2.0 0.0004555 0.46 AML other m 2020-08-23T19:20:41.52
IV.RM33.EHE. ML:2.0 0.00046248009999999996 0.2944 AML other m 2020-08-23T19:20:41.98
IV.RM33.HNE. ML:2.0 0.0004783001 0.2944 AML other m 2020-08-23T19:20:41.98
IV.CESI.HHN. ML:2.2 0.0008374876 0.32 AML other m 2020-08-23T19:20:43.19
IV.CESI.HHE. ML:2.0 0.00046716749999999995 0.1792 AML other m 2020-08-23T19:20:43.19
IV.MF5.EHE. ML:1.9 0.0003645338500000001 0.2432 AML other m 2020-08-23T19:20:43.51
IV.MF5.EHN. ML:2.0 0.00040038545000000005 0.3712 AML other m 2020-08-23T19:20:43.81
IV.GUMA.HNE. ML:2.2 0.0006813982 0.2944 AML other m 2020-08-23T19:20:44.06
IV.TERO.HHE. ML:1.7 0.000174 0.52 AML other m 2020-08-23T19:20:44.30
IV.GUMA.HHN. ML:2.3 0.0009325 0.3 AML other m 2020-08-23T19:20:45.34
IV.TERO.HHN. ML:1.9 0.00025123509999999997 0.5248 AML other m 2020-08-23T19:20:46.02
IV.TERO.HNN. ML:2.0 0.000319 0.5 AML other m 2020-08-23T19:20:46.28
IV.SMA1.EHN. ML:2.1 0.0008100000000000001 1.56 AML other m 2020-08-23T19:20:46.91
IV.ARRO.EHE. ML:1.6 0.00014350000000000002 0.2 AML other m 2020-08-23T19:20:46.44
IV.SAP2.EHN. ML:2.5 0.0011600000000000002 0.52 AML other m 2020-08-23T19:20:46.24
IV.SAP2.EHE. ML:1.9 0.00029099999999999997 0.52 AML other m 2020-08-23T19:20:47.42
IV.GUMA.HHE. ML:2.3 0.0009148031999999999 0.3328 AML other m 2020-08-23T19:20:47.28
IV.ASSB.HHN. ML:1.9 0.00023649999999999998 0.94 AML other m 2020-08-23T19:20:47.96
IV.ARRO.EHN. ML:1.6 0.000143 1.52 AML other m 2020-08-23T19:20:47.97
IV.TERO.HNE. ML:1.8 0.0001919402 0.32 AML other m 2020-08-23T19:20:48.60
IV.ASSB.HHE. ML:2.0 0.0002575 0.98 AML other m 2020-08-23T19:20:48.31
IV.GUMA.HNN. ML:2.7 0.0019455610000000002 2.9184 AML other m 2020-08-23T19:20:49.03
IV.MNTT.EHN. ML:2.4 0.0007749752000000001 0.3072 AML other m 2020-08-23T19:20:49.05
IV.FIAM.HHE. ML:1.2 0.000038467015 0.2176 AML other m 2020-08-23T19:20:49.68
IV.MNTT.EHE. ML:2.4 0.0007675000000000001 1.54 AML other m 2020-08-23T19:20:49.06
IV.FIAM.HHN. ML:1.2 0.000032893445 0.2048 AML other m 2020-08-23T19:20:49.91
IV.OFFI.HHE. ML:1.9 0.00023649999999999998 0.98 AML other m 2020-08-23T19:20:50.51
IV.ATCC.EHE. ML:1.9 0.0001519104 0.4608 AML other m 2020-08-23T19:20:50.91
IV.OFFI.HHN. ML:2.1 0.00033436465 0.576 AML other m 2020-08-23T19:20:51.35
IV.EL6.EHN. ML:1.9 0.0001525392 0.256 AML other m 2020-08-23T19:20:51.21
IV.FIAM.HNE. ML:3.0 0.00218831 1.5488 AML other m 2020-08-23T19:20:51.94
IV.ATCC.EHN. ML:1.9 0.00017449999999999999 1.66 AML other m 2020-08-23T19:20:52.87
IV.EL6.EHE. ML:1.9 0.0001655 0.36 AML other m 2020-08-23T19:20:53.74
IV.VCEL.EHE. ML:2.0 0.00015183025 0.1792 AML other m 2020-08-23T19:20:55.66
IV.FAGN.HHE. ML:1.9 0.00013481585 0.2688 AML other m 2020-08-23T19:20:56.32
IV.FAGN.HHN. ML:1.9 0.0001402311 0.32 AML other m 2020-08-23T19:20:56.68
IV.VCEL.EHN. ML:2.0 0.0001535 1.42 AML other m 2020-08-23T19:20:57.25
IV.ARVD.HHE. ML:1.5 0.000046 0.4 AML other m 2020-08-23T19:20:58.68
IV.ARVD.HHN. ML:1.4 0.000033569495000000004 0.1792 AML other m 2020-08-23T19:20:58.89
IV.FIAM.HNN. ML:1.7 0.000119260541 0.7552 AML other m 2020-08-23T19:21:05.57
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
Waveforms Seismic signals in miniseed + resp format Download