Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 31-10-2020 and time 18:37:36 (Italy) in region 2 km S Amatrice (RI)

A magnitude ML 1.7 earthquake occured in region: 2 km S Amatrice (RI), on

  • 31-10-2020 17:37:36 (UTC)
  • 31-10-2020 18:37:36 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.6170, 13.2890 at 11 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 2 2657 2657
Campotosto AQ 9 542 3199
Accumoli RI 9 667 3866
Cittareale RI 11 482 4348
Capitignano AQ 11 665 5013
Montereale AQ 11 2581 7594
Borbona RI 17 617 8211
Crognaleto TE 17 1297 9508
Arquata del Tronto AP 18 1178 10686
Cortino TE 18 656 11342
Cagnano Amiterno AQ 18 1369 12711
Barete AQ 18 737 13448
Posta RI 19 694 14142
Acquasanta Terme AP 20 2916 17058
Pizzoli AQ 20 4326 21384

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km NW of L'Aquila (69753 inhabitants)
34 Km W of Teramo (54892 inhabitants)
53 Km E of Terni (111501 inhabitants)
61 Km SE of Foligno (57155 inhabitants)
71 Km W of Montesilvano (53738 inhabitants)
78 Km W of Pescara (121014 inhabitants)
78 Km W of Chieti (51815 inhabitants)
83 Km NE of Guidonia Montecelio (88673 inhabitants)
83 Km NE of Tivoli (56533 inhabitants)
91 Km SE of Perugia (166134 inhabitants)
100 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 1.7 2020-10-31
17:37:36		 42.6167 13.2893 11 2021-02-26
14:56:15		 Bollettino Sismico Italiano INGV 86241301
Reviewed
Rev100 		ML 1.7 2020-10-31
17:37:36		 42.6252 13.2878 11 2020-10-31
17:46:23		 Sala Sismica INGV-Roma 84327561
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-31 17:37:36 ± 0.05
Latitude 42.6167 ± 0.0027
Longitude 13.2893 ± 0.0049
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86241301

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 359
Semi-minor axis of confidence ellipse (meter) 160
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 248
Circular confidence region, given by single value of horizontal uncertainty (meter) 360.0
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 42
Number of defining phases 37
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.56028
Number of stations at which the event was observed 24
Number of stations from which data was used for origin computation 21
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 30
Type of magnitude ML
Reference to an origin 86241301
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-14 08:46:56

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 34
Type of magnitude ML
Reference to an origin 84327561
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-31 17:46:23
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RNI2.HHZ. 2020-10-31T17:37:56.08 3.0 negative manual P -0.89 0
IV.MOMA.HHZ. 2020-10-31T17:37:56.06 0.3 undecidable manual S 290 62.1933 50 0.43 62
IV.T0110.HHZ. 2020-10-31T17:37:55.37 3.0 undecidable manual S 0.41 0
IV.CESX.HHZ. 2020-10-31T17:37:54.66 0.3 undecidable manual S 269 57.3981 50 0.32 64
IV.CESI.HHZ. 2020-10-31T17:37:53.45 0.6 undecidable manual S 324 53.2023 50 0.21 44
IV.CSP1.EHZ. 2020-10-31T17:37:53.65 0.3 undecidable manual S 353 53.1024 50 0.43 62
IV.FDMO.HHZ. 2020-10-31T17:37:52.64 0.3 undecidable manual S 341 49.4172 50 0.43 63
IV.FAGN.HHZ. 2020-10-31T17:37:51.54 3.0 undecidable manual S -0.02 0
IV.MMO1.EHZ. 2020-10-31T17:37:47.23 0.1 undecidable manual S 6 31.5462 50 -0.21 94
IV.GAVE.EHZ. 2020-10-31T17:37:47.59 0.1 undecidable manual S 285 33.3444 50 -0.33 90
IV.T0110.HHZ. 2020-10-31T17:37:47.21 3.0 undecidable manual P 0.02 0
IV.MOMA.HHZ. 2020-10-31T17:37:47.47 0.1 undecidable manual P 290 62.1933 50 -0.09 90
IV.CSP1.EHZ. 2020-10-31T17:37:46.21 0.6 undecidable manual P 353 53.1024 50 0.04 46
IV.CESX.HHZ. 2020-10-31T17:37:46.68 0.3 undecidable manual P 269 57.3981 50 -0.14 67
MN.AQU.HNZ. 2020-10-31T17:37:46.80 0.6 undecidable manual S 162 30.6471 50 -0.41 44
IV.CESI.HHZ. 2020-10-31T17:37:46.14 0.3 undecidable manual P 324 53.2023 50 -0.04 69
IV.GIGS.HJZ. 2020-10-31T17:37:46.59 0.3 undecidable manual S 128 29.4483 50 -0.3 69
IV.NRCA.HHZ. 2020-10-31T17:37:45.95 0.1 undecidable manual S 329 27.9498 50 -0.55 87
IV.GUMA.HHZ. 2020-10-31T17:37:45.93 0.1 undecidable manual P 4 49.617 50 0.31 87
IV.FDMO.HHZ. 2020-10-31T17:37:45.35 0.3 undecidable manual P 341 49.4172 50 -0.23 67
IV.FAGN.HHZ. 2020-10-31T17:37:45.58 3.0 undecidable manual P 0.35 0
IV.MF5.EHZ. 2020-10-31T17:37:45.06 0.3 undecidable manual P 19 43.4232 50 0.39 65
IV.TERO.HHZ. 2020-10-31T17:37:45.56 0.3 undecidable manual S 88 25.6521 50 -0.33 69
IV.ARRO.EHZ. 2020-10-31T17:37:44.40 0.1 undecidable manual P 265 42.9237 50 -0.2 91
IV.MC2.EHZ. 2020-10-31T17:37:43.10 0.3 undecidable manual P 346 33.744 50 -0.07 72
IV.MTRA.EHZ. 2020-10-31T17:37:43.25 0.1 undecidable manual S 29 17.871 121 -0.54 90
IV.GIGS.HJZ. 2020-10-31T17:37:42.46 0.3 undecidable manual P 128 29.4483 50 -0.05 72
IV.CAMP.HHZ. 2020-10-31T17:37:42.57 0.1 undecidable manual S 133 13.2756 129 0.07 99
IV.NRCA.HHZ. 2020-10-31T17:37:42.06 0.1 undecidable manual P 329 27.9498 50 -0.23 93
IV.RM33.EHZ. 2020-10-31T17:37:42.59 0.3 undecidable manual S 207 13.3755 129 0.05 74
IV.MMO1.EHZ. 2020-10-31T17:37:42.74 0.1 undecidable manual P 6 31.5462 50 -0.09 96
MN.AQU.HNZ. 2020-10-31T17:37:42.65 0.1 undecidable manual P 162 30.6471 50 -0.05 96
IV.GAVE.EHZ. 2020-10-31T17:37:42.93 0.1 undecidable manual P 285 33.3444 50 -0.18 93
IV.TERO.HHZ. 2020-10-31T17:37:41.88 0.1 undecidable manual P 88 25.6521 50 -0.06 97
IV.LNSS.HHZ. 2020-10-31T17:37:41.06 0.1 undecidable manual P 266 20.3685 50 -0.06 97
IV.RM33.EHZ. 2020-10-31T17:37:40.23 0.1 undecidable manual P 207 13.3755 129 0.23 96
IV.SMA1.EHZ. 2020-10-31T17:37:40.71 0.1 undecidable manual S 68 4.0959 160 0.14 100
IV.MTRA.EHZ. 2020-10-31T17:37:40.60 0.1 undecidable manual P 29 17.871 121 -0.12 97
IV.CAMP.HHZ. 2020-10-31T17:37:40.21 0.1 undecidable manual P 133 13.2756 129 0.23 95
IV.T1299.HNN. 2020-10-31T17:37:40.32 0.1 undecidable manual S 343 1.998 169 -0.06 98
IV.SMA1.EHZ. 2020-10-31T17:37:39.19 0.1 undecidable manual P 68 4.0959 160 0.32 95
IV.T1299.HNN. 2020-10-31T17:37:38.99 0.1 undecidable manual P 343 1.998 169 0.23 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RM33.EHN. ML:2.1 0.0012250000000000002 1.7 AML other m 2020-10-31T17:37:42.86
IV.RM33.HNN. ML:2.1 0.00125 1.7 AML other m 2020-10-31T17:37:42.86
IV.CAMP.HHE. ML:1.4 0.00026249999999999993 1.08 AML other m 2020-10-31T17:37:43.17
IV.RM33.HNE. ML:2.0 0.0010535000000000002 0.18 AML other m 2020-10-31T17:37:43.19
IV.RM33.EHE. ML:2.0 0.001007 0.18 AML other m 2020-10-31T17:37:43.19
IV.MTRA.EHN. ML:2.0 0.0007934999999999999 0.2 AML other m 2020-10-31T17:37:43.62
IV.MTRA.HNN. ML:2.0 0.0007615 0.2 AML other m 2020-10-31T17:37:43.62
IV.CAMP.HHN. ML:1.3 0.00022 1.78 AML other m 2020-10-31T17:37:43.08
IV.MTRA.EHE. ML:1.9 0.0006385000000000001 0.66 AML other m 2020-10-31T17:37:44.82
IV.MTRA.HNE. ML:1.9 0.0006490000000000001 0.66 AML other m 2020-10-31T17:37:44.82
IV.LNSS.HHE. ML:1.6 0.0002675 0.14 AML other m 2020-10-31T17:37:45.57
IV.LNSS.HHN. ML:1.5 0.00024349999999999998 0.94 AML other m 2020-10-31T17:37:45.28
IV.NRCA.HHE. ML:2.2 0.000757 0.18 AML other m 2020-10-31T17:37:46.28
IV.TERO.HHN. ML:1.8 0.00036199999999999996 0.68 AML other m 2020-10-31T17:37:46.39
IV.TERO.HHE. ML:1.7 0.000295 0.34 AML other m 2020-10-31T17:37:46.38
IV.NRCA.HHN. ML:1.8 0.00033699999999999995 0.08 AML other m 2020-10-31T17:37:46.83
IV.ARRO.EHE. ML:1.3 0.00006705 0.14 AML other m 2020-10-31T17:37:51.62
IV.ARRO.EHN. ML:1.4 0.0000738 0.18 AML other m 2020-10-31T17:37:52.39
IV.FAGN.HHE. ML:1.8 0.000179 0.9 AML other m 2020-10-31T17:37:54.49
IV.CESI.HHE. ML:1.2 0.000041751865 0.128 AML other m 2020-10-31T17:37:54.67
IV.FAGN.HHN. ML:1.8 0.00019 0.24 AML other m 2020-10-31T17:37:54.70
IV.CSP1.EHE. ML:1.6 0.00010485 0.46 AML other m 2020-10-31T17:37:54.95
IV.CESI.HHN. ML:1.5 0.000071 1.58 AML other m 2020-10-31T17:37:55.98
IV.CSP1.EHN. ML:1.7 0.000112 0.58 AML other m 2020-10-31T17:37:56.62
IV.CESX.HHE. ML:1.4 0.00005835 0.94 AML other m 2020-10-31T17:37:57.04
IV.CESX.HHN. ML:1.4 0.000061 0.3 AML other m 2020-10-31T17:37:57.05
IV.MOMA.HHE. ML:1.9 0.0001385 0.22 AML other m 2020-10-31T17:37:57.67
IV.T0110.HHE. ML:1.7 0.0001075 0.4 AML other m 2020-10-31T17:37:58.55
IV.MOMA.HHN. ML:1.6 0.00008230000000000001 0.94 AML other m 2020-10-31T17:37:59.49
IV.T0110.HHN. ML:1.6 0.00009570000000000001 0.28 AML other m 2020-10-31T17:37:59.81
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