Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 12-10-2021 and time 18:23:27 (Italy) in region 4 km SW Amatrice (RI)

A magnitude ML 2.1 earthquake occured in region: 4 km SW Amatrice (RI), on

  • 12-10-2021 16:23:27 (UTC)
  • 12-10-2021 18:23:27 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.5950, 13.2740 at 16 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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Amatrice RI 4 2657 2657
Montereale AQ 8 2581 5238
Capitignano AQ 9 665 5903
Campotosto AQ 9 542 6445
Cittareale RI 10 482 6927
Accumoli RI 11 667 7594
Borbona RI 15 617 8211
Cagnano Amiterno AQ 16 1369 9580
Barete AQ 16 737 10317
Posta RI 17 694 11011
Crognaleto TE 18 1297 12308
Pizzoli AQ 18 4326 16634
Cortino TE 19 656 17290
Arquata del Tronto AP 20 1178 18468

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km NW of L'Aquila (69753 inhabitants)
36 Km W of Teramo (54892 inhabitants)
51 Km E of Terni (111501 inhabitants)
62 Km SE of Foligno (57155 inhabitants)
72 Km W of Montesilvano (53738 inhabitants)
78 Km W of Chieti (51815 inhabitants)
78 Km W of Pescara (121014 inhabitants)
80 Km NE of Guidonia Montecelio (88673 inhabitants)
80 Km NE of Tivoli (56533 inhabitants)
92 Km SE of Perugia (166134 inhabitants)
98 Km E of Viterbo (67173 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 2.1 2021-10-12
16:23:27		 42.5953 13.2743 16 2022-03-30
13:04:28		 Bollettino Sismico Italiano INGV 99546341
Reviewed
Rev100 		ML 2.1 2021-10-12
16:23:27		 42.5958 13.2722 17 2021-10-12
16:42:37		 Sala Sismica INGV-Roma 96478701
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-12 16:23:27 ± 0.06
Latitude 42.5953 ± 0.0027
Longitude 13.2743 ± 0.0049
Depth (km) 16 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 99546341

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 390
Semi-minor axis of confidence ellipse (meter) 38
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 59
Circular confidence region, given by single value of horizontal uncertainty (meter) 390.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 61
Number of associated phases, regardless of their use for origin computation 57
Number of defining phases 57
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.03957
Epicentral distance of station farthest from the epicenter (degree) 0.86695
Number of stations at which the event was observed 31
Number of stations from which data was used for origin computation 31
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 52
Type of magnitude ML
Reference to an origin 99546341
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-01-10 17:05:23

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 52
Type of magnitude ML
Reference to an origin 96478701
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-12 16:42:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.LPEL.HHZ. 2021-10-12T16:23:56.40 0.6 undecidable manual S 129 96.2259 93 0.45 39
IV.MML1.EHZ. 2021-10-12T16:23:47.20 0.3 undecidable manual S 337 62.493 96 0.22 65
IV.CESX.HHZ. 2021-10-12T16:23:45.60 0.6 undecidable manual S 272 56.1993 97 0.31 43
IV.CESI.HHZ. 2021-10-12T16:23:45.10 0.3 undecidable manual S 327 54.501 97 0.26 66
IV.GUMA.HHZ. 2021-10-12T16:23:45.00 0.3 undecidable manual S 5 52.1034 97 0.8 56
IV.T0110.HHZ. 2021-10-12T16:23:45.90 0.3 undecidable manual S 134 57.7977 96 0.18 67
IV.CSP1.EHZ. 2021-10-12T16:23:45.40 0.3 undecidable manual S 354 55.4001 97 0.32 65
IV.VCEL.EHZ. 2021-10-12T16:23:44.70 0.3 undecidable manual S 116 51.4152 97 0.67 59
IV.FDMO.HHZ. 2021-10-12T16:23:44.00 0.3 undecidable manual S 343 51.2154 97 0.01 70
IV.MF5.EHZ. 2021-10-12T16:23:43.40 0.1 undecidable manual S 19 46.0206 98 0.78 76
IV.LPEL.HHZ. 2021-10-12T16:23:43.92 0.6 undecidable manual P 129 96.2259 93 -0.12 42
IV.FEMA.HNE. 2021-10-12T16:23:42.31 0.3 undecidable manual S 336 44.622 99 0.08 70
IV.FAGN.HHZ. 2021-10-12T16:23:42.50 0.3 undecidable manual S 145 44.5221 99 0.3 67
IV.ARRO.EHZ. 2021-10-12T16:23:41.40 0.3 undecidable manual S 268 41.625 100 -0.04 71
IV.INTR.HHZ. 2021-10-12T16:23:41.99 0.6 undecidable manual P 141 82.8504 94 0 44
IV.ASSB.HHZ. 2021-10-12T16:23:40.20 0.3 undecidable manual P 315 70.4739 95 0.12 66
IV.MC2.EHZ. 2021-10-12T16:23:40.10 0.1 undecidable manual S 349 35.742 102 0.2 92
IV.FIAM.HNN. 2021-10-12T16:23:40.80 0.6 undecidable manual S 200 38.5281 101 0.17 46
IV.MMO1.EHZ. 2021-10-12T16:23:39.30 0.1 undecidable manual S 7 33.9438 103 -0.14 94
IV.NRCA.HNZ. 2021-10-12T16:23:38.00 0.1 undecidable manual S 334 29.4483 106 -0.28 92
IV.MML1.EHZ. 2021-10-12T16:23:38.62 0.1 undecidable manual P 337 62.493 96 -0.24 88
MN.AQU.HNN. 2021-10-12T16:23:38.19 0.3 undecidable manual S 158 28.8489 106 0.08 72
IV.MNTT.EHZ. 2021-10-12T16:23:38.09 0.3 undecidable manual P 27 57.9975 96 -0.07 68
IV.CESI.HHZ. 2021-10-12T16:23:37.29 0.1 undecidable manual P 327 54.501 97 -0.34 87
IV.CESX.HHZ. 2021-10-12T16:23:37.95 0.3 undecidable manual P 272 56.1993 97 0.07 68
IV.GUMA.HHZ. 2021-10-12T16:23:37.31 0.1 undecidable manual P 5 52.1034 97 0.05 92
IV.TERO.HHZ. 2021-10-12T16:23:37.20 0.1 undecidable manual S 83 27.0507 108 -0.47 88
IV.T0110.HHZ. 2021-10-12T16:23:37.79 0.1 undecidable manual P 134 57.7977 96 -0.34 86
IV.CSP1.EHZ. 2021-10-12T16:23:37.38 0.1 undecidable manual P 354 55.4001 97 -0.38 86
IV.VCEL.EHZ. 2021-10-12T16:23:37.14 0.1 negative manual P 116 51.4152 97 -0.01 93
IV.OFFI.HHZ. 2021-10-12T16:23:37.55 0.1 undecidable manual P 42 50.4162 98 0.55 83
IV.GIGS.HHN. 2021-10-12T16:23:37.76 0.1 undecidable manual S 123 29.0487 106 -0.41 89
IV.FIAM.HNN. 2021-10-12T16:23:36.03 0.3 undecidable manual P 200 38.5281 101 0.83 56
IV.FDMO.HHZ. 2021-10-12T16:23:36.75 0.1 undecidable manual P 343 51.2154 97 -0.38 87
IV.MF5.EHZ. 2021-10-12T16:23:36.48 0.1 positive manual P 19 46.0206 98 0.14 92
IV.FAGN.HHZ. 2021-10-12T16:23:36.23 0.3 undecidable manual P 145 44.5221 99 0.13 69
IV.MTRA.EHZ. 2021-10-12T16:23:35.60 0.1 undecidable manual S 29 20.4684 116 -0.43 90
IV.ARRO.EHZ. 2021-10-12T16:23:35.42 0.1 undecidable manual P 268 41.625 100 -0.24 91
IV.LNSS.HHZ. 2021-10-12T16:23:35.90 0.1 undecidable manual S 273 19.1697 119 0.18 95
IV.FEMA.HNE. 2021-10-12T16:23:35.92 0.3 undecidable manual P 336 44.622 99 -0.19 69
IV.MMO1.EHZ. 2021-10-12T16:23:34.22 0.1 positive manual P 7 33.9438 103 -0.29 91
IV.CAMP.HHZ. 2021-10-12T16:23:34.20 0.1 undecidable manual S 121 12.876 133 -0.15 96
IV.MC2.EHZ. 2021-10-12T16:23:34.60 0.1 positive manual P 349 35.742 102 -0.17 93
IV.GAVE.EHZ. 2021-10-12T16:23:34.13 0.1 positive manual P 289 32.8449 104 -0.21 93
IV.RM33.EHZ. 2021-10-12T16:23:34.20 0.3 undecidable manual S 207 10.7781 139 0.23 72
IV.T1299.HNN. 2021-10-12T16:23:33.41 0.1 undecidable manual S 8 4.3956 162 0.3 96
IV.NRCA.HNZ. 2021-10-12T16:23:33.56 0.1 positive manual P 334 29.4483 106 -0.28 92
IV.SMA1.EHZ. 2021-10-12T16:23:33.50 0.3 undecidable manual S 52 6.2937 154 0.19 74
IV.GIGS.HHN. 2021-10-12T16:23:33.39 0.1 negative manual P 123 29.0487 106 -0.38 90
IV.TERO.HHZ. 2021-10-12T16:23:33.12 0.1 undecidable manual P 83 27.0507 108 -0.36 90
MN.AQU.HNN. 2021-10-12T16:23:33.87 0.6 undecidable manual P 158 28.8489 106 0.13 47
IV.MTRA.EHZ. 2021-10-12T16:23:32.26 0.1 negative manual P 29 20.4684 116 -0.28 93
IV.LNSS.HHZ. 2021-10-12T16:23:32.36 0.1 positive manual P 273 19.1697 119 0 99
IV.RM33.EHZ. 2021-10-12T16:23:31.49 0.1 positive manual P 207 10.7781 139 0.14 98
IV.SMA1.EHZ. 2021-10-12T16:23:31.05 0.1 negative manual P 52 6.2937 154 0.08 100
IV.T1299.HNN. 2021-10-12T16:23:31.00 0.1 negative manual P 8 4.3956 162 0.15 99
IV.CAMP.HHZ. 2021-10-12T16:23:31.53 0.1 negative manual P 121 12.876 133 -0.04 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHN. ML:0.0 0.00071178085 0.1664 AML other m 2021-10-12T16:23:33.96
IV.SMA1.EHE. ML:0.0 0.0009153984499999999 0.1536 AML other m 2021-10-12T16:23:34.21
IV.CAMP.HHN. ML:0.0 0.00057344395 0.2176 AML other m 2021-10-12T16:23:34.54
IV.CAMP.HHE. ML:0.0 0.00046564335 0.2048 AML other m 2021-10-12T16:23:34.42
IV.RM33.EHE. ML:0.0 0.0028357210000000002 0.256 AML other m 2021-10-12T16:23:34.53
IV.RM33.HNE. ML:0.0 0.002931415 0.256 AML other m 2021-10-12T16:23:34.54
IV.RM33.HNN. ML:0.0 0.0030905255 0.1024 AML other m 2021-10-12T16:23:34.55
IV.RM33.EHN. ML:0.0 0.0031235984999999997 0.0896 AML other m 2021-10-12T16:23:34.54
IV.MTRA.EHN. ML:0.0 0.0022300945 0.128 AML other m 2021-10-12T16:23:35.71
IV.MTRA.HNN. ML:0.0 0.0021990955 0.1408 AML other m 2021-10-12T16:23:35.71
IV.MTRA.HNE. ML:0.0 0.0021001080000000003 0.0896 AML other m 2021-10-12T16:23:35.99
IV.MTRA.EHE. ML:0.0 0.0021294754999999998 0.1024 AML other m 2021-10-12T16:23:35.99
IV.LNSS.HHE. ML:0.0 0.00124403 0.192 AML other m 2021-10-12T16:23:36.45
IV.LNSS.HNE. ML:0.0 0.0012276885000000002 0.192 AML other m 2021-10-12T16:23:36.45
IV.LNSS.HNN. ML:0.0 0.0008834705000000001 0.1664 AML other m 2021-10-12T16:23:36.98
IV.LNSS.HHN. ML:0.0 0.00102404965 0.1536 AML other m 2021-10-12T16:23:36.98
IV.TERO.HHE. ML:0.0 0.0008565141000000001 0.1408 AML other m 2021-10-12T16:23:37.36
IV.TERO.HNE. ML:0.0 0.001201327 0.128 AML other m 2021-10-12T16:23:37.36
IV.TERO.HNN. ML:2.3 0.0010715 0.38 AML other m 2021-10-12T16:23:37.42
IV.TERO.HHN. ML:2.4 0.0012349999999999998 0.4 AML other m 2021-10-12T16:23:37.61
IV.NRCA.HNN. ML:2.5 0.0013900000000000002 0.4 AML other m 2021-10-12T16:23:38.43
IV.NRCA.HHN. ML:2.5 0.00152 0.38 AML other m 2021-10-12T16:23:38.43
IV.NRCA.HHE. ML:2.7 0.0022949999999999997 0.42 AML other m 2021-10-12T16:23:38.45
IV.NRCA.HNE. ML:2.7 0.00212 0.42 AML other m 2021-10-12T16:23:38.45
IV.GAVE.EHN. ML:2.1 0.0004805 0.34 AML other m 2021-10-12T16:23:40.04
IV.GAVE.EHE. ML:2.1 0.0005445 0.18 AML other m 2021-10-12T16:23:40.15
IV.ARRO.EHE. ML:1.7 0.0001545 1.78 AML other m 2021-10-12T16:23:42.03
IV.MF5.EHE. ML:2.1 0.00034199999999999996 0.2 AML other m 2021-10-12T16:23:43.64
IV.MF5.EHN. ML:2.2 0.000433 0.32 AML other m 2021-10-12T16:23:43.68
IV.ARRO.EHN. ML:1.6 0.00011855000000000002 0.96 AML other m 2021-10-12T16:23:44.18
IV.GUMA.HHE. ML:2.3 0.0004385 0.3 AML other m 2021-10-12T16:23:45.51
IV.FDMO.HHE. ML:1.5 0.00007829999999999999 1.18 AML other m 2021-10-12T16:23:46.71
IV.FDMO.HHN. ML:1.6 0.0000877 1.24 AML other m 2021-10-12T16:23:46.90
IV.VCEL.EHE. ML:2.4 0.0005925 0.42 AML other m 2021-10-12T16:23:46.69
IV.GUMA.HHN. ML:2.0 0.00023249999999999999 1.26 AML other m 2021-10-12T16:23:46.18
IV.CSP1.EHE. ML:2.0 0.00019350000000000001 0.3 AML other m 2021-10-12T16:23:46.82
IV.CESI.HHN. ML:1.8 0.00013350000000000002 1.68 AML other m 2021-10-12T16:23:46.09
IV.OFFI.HHN. ML:2.2 0.000354 0.9 AML other m 2021-10-12T16:23:47.49
IV.CESI.HHE. ML:1.7 0.0001061 0.42 AML other m 2021-10-12T16:23:47.25
IV.VCEL.EHN. ML:2.3 0.000503 0.94 AML other m 2021-10-12T16:23:47.78
IV.OFFI.HHE. ML:2.2 0.00040449999999999997 0.42 AML other m 2021-10-12T16:23:47.80
IV.MML1.EHE. ML:1.5 0.00006594999999999999 1.44 AML other m 2021-10-12T16:23:48.85
IV.T0110.HHN. ML:2.0 0.000193 0.36 AML other m 2021-10-12T16:23:48.68
IV.FAGN.HHE. ML:2.0 0.00028700000000000004 0.38 AML other m 2021-10-12T16:23:49.40
IV.CSP1.EHN. ML:2.0 0.0002305 1.1 AML other m 2021-10-12T16:23:49.43
IV.T0110.HHE. ML:2.0 0.0002255 0.34 AML other m 2021-10-12T16:23:53.05
IV.MML1.EHN. ML:1.7 0.00009005 1.12 AML other m 2021-10-12T16:23:53.02
IV.ASSB.HHN. ML:1.7 0.00008355 0.3 AML other m 2021-10-12T16:23:53.48
IV.FAGN.HHN. ML:1.9 0.00023 0.42 AML other m 2021-10-12T16:23:53.63
IV.ASSB.HHE. ML:1.9 0.000134 1.7 AML other m 2021-10-12T16:23:54.01
IV.INTR.HHN. ML:1.7 0.0000588 0.36 AML other m 2021-10-12T16:24:01.55
IV.INTR.HHE. ML:1.7 0.0000616 0.5 AML other m 2021-10-12T16:24:02.93
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