Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 27-10-2021 and time 08:39:17 (Italy) in region 2 km SW Amatrice (RI)

A magnitude ML 1.5 earthquake occured in region: 2 km SW Amatrice (RI), on

  • 27-10-2021 06:39:17 (UTC)
  • 27-10-2021 08:39:17 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6200, 13.2750 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.

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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
Accumoli RI 9 667 3324
Cittareale RI 9 482 3806
Campotosto AQ 11 542 4348
Montereale AQ 11 2581 6929
Capitignano AQ 11 665 7594
Borbona RI 17 617 8211
Arquata del Tronto AP 17 1178 9389
Posta RI 18 694 10083
Cagnano Amiterno AQ 18 1369 11452
Crognaleto TE 19 1297 12749
Barete AQ 19 737 13486
Cortino TE 19 656 14142
Acquasanta Terme AP 20 2916 17058

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km NW of L'Aquila (69753 inhabitants)
36 Km W of Teramo (54892 inhabitants)
52 Km E of Terni (111501 inhabitants)
60 Km SE of Foligno (57155 inhabitants)
73 Km W of Montesilvano (53738 inhabitants)
79 Km W of Pescara (121014 inhabitants)
79 Km W of Chieti (51815 inhabitants)
82 Km NE of Guidonia Montecelio (88673 inhabitants)
83 Km NE of Tivoli (56533 inhabitants)
90 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 1.5 2021-10-27
06:39:17		 42.6203 13.2747 9 2022-03-30
13:04:38		 Bollettino Sismico Italiano INGV 101077511
Reviewed
Rev100 		ML 1.5 2021-10-27
06:39:17		 42.6215 13.2772 9 2021-10-27
06:48:12		 Sala Sismica INGV-Roma 97014791
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-27 06:39:17 ± 0.06
Latitude 42.6203 ± 0.0036
Longitude 13.2747 ± 0.0037
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 101077511

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 347
Semi-minor axis of confidence ellipse (meter) 294
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 41
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) 72
Number of associated phases, regardless of their use for origin computation 41
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.47394
Number of stations at which the event was observed 32
Number of stations from which data was used for origin computation 15
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 28
Type of magnitude ML
Reference to an origin 101077511
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-02-17 10:10:58

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 28
Type of magnitude ML
Reference to an origin 97014791
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-27 06:48:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CTL8.HNZ. 2021-10-27T06:41:15.40 3.0 undecidable manual Sg 15.47 0
MN.KLV.HHZ. 2021-10-27T06:41:14.70 3.0 undecidable manual Pn -2.98 0
IV.CTI.HHZ. 2021-10-27T06:41:06.95 3.0 undecidable manual Sg 8.37 0
SL.LJU.BHZ. 2021-10-27T06:40:51.22 3.0 undecidable manual Sn -5.45 0
IV.PTRP.HHZ. 2021-10-27T06:40:50.75 3.0 undecidable manual Sg 7.09 0
IV.HAGA.HHZ. 2021-10-27T06:40:48.91 3.0 undecidable manual Pg 7.83 0
IV.MNTV.EHZ. 2021-10-27T06:40:46.10 3.0 undecidable manual Sn 0.14 0
IV.MTMR.EHZ. 2021-10-27T06:40:22.68 3.0 undecidable manual Sg -0.85 0
IV.JOPP.HHZ. 2021-10-27T06:40:22.15 3.0 undecidable manual Pn -4.56 0
IV.EUCT.HNZ. 2021-10-27T06:40:18.43 3.0 negative manual Pn -0.46 0
IV.IMOL.HNZ. 2021-10-27T06:40:17.92 3.0 undecidable manual Sn -2.71 0
IV.CAR1.HHZ. 2021-10-27T06:40:15.86 3.0 negative manual Pn -4.78 0
IV.TDS.HHZ. 2021-10-27T06:40:15.36 3.0 negative manual Pn -1.45 0
IV.RIBO.EHZ.01 2021-10-27T06:40:12.62 3.0 undecidable manual Sg 1.27 0
IV.MELA.HHZ. 2021-10-27T06:40:10.40 3.0 undecidable manual Sg -1.22 0
IX.SCL3.EHZ.02 2021-10-27T06:40:03.81 3.0 negative manual Pg 3.53 0
IV.RAVA.EHZ. 2021-10-27T06:40:00.31 3.0 positive manual Pn -0.63 0
IV.MMO1.EHZ. 2021-10-27T06:39:28.31 0.3 undecidable manual S 8 31.2465 106 0.03 72
IV.GAVE.EHZ. 2021-10-27T06:39:28.03 0.3 undecidable manual S 285 32.0457 50 -0.5 65
IV.NRCA.HHZ. 2021-10-27T06:39:27.00 0.3 undecidable manual S 331 27.0507 108 0.12 71
IV.GUMA.HHZ. 2021-10-27T06:39:26.81 0.3 undecidable manual P 6 49.3173 50 0.49 63
IV.TERO.HHZ. 2021-10-27T06:39:26.58 0.3 undecidable manual S 89 26.8509 108 -0.25 69
IV.CSP1.EHZ. 2021-10-27T06:39:26.90 0.3 undecidable manual P 354 52.6029 50 0.07 69
IV.CESI.HHZ. 2021-10-27T06:39:26.87 0.3 undecidable manual P 325 52.2033 50 0.1 69
IV.FDMO.HHZ. 2021-10-27T06:39:26.20 0.3 undecidable manual P 342 48.618 50 -0.02 70
IV.ARRO.EHZ. 2021-10-27T06:39:25.14 0.3 undecidable manual P 264 41.8248 50 -0.03 71
IV.LNSS.HHZ. 2021-10-27T06:39:24.50 0.3 undecidable manual S 264 19.2696 115 0.14 72
IV.GAVE.EHZ. 2021-10-27T06:39:23.43 0.3 undecidable manual P 285 32.0457 50 -0.23 69
IV.MMO1.EHZ. 2021-10-27T06:39:23.49 0.3 undecidable manual P 8 31.2465 106 -0.03 72
IV.MC2.EHZ. 2021-10-27T06:39:23.86 0.3 undecidable manual P 348 33.0447 50 0.04 72
IV.RM33.EHZ. 2021-10-27T06:39:22.63 0.3 undecidable manual S 202 13.2756 124 0.07 74
IV.TERO.HHZ. 2021-10-27T06:39:22.55 0.1 undecidable manual P 89 26.8509 108 -0.13 95
IV.CAMP.HHZ. 2021-10-27T06:39:22.85 0.3 undecidable manual S 130 14.4744 121 -0.04 74
IV.NRCA.HHZ. 2021-10-27T06:39:22.66 0.1 undecidable manual P 331 27.0507 108 -0.05 96
IV.LNSS.HHZ. 2021-10-27T06:39:21.37 0.1 undecidable manual P 264 19.2696 115 0.11 97
IV.CAMP.HHZ. 2021-10-27T06:39:20.56 0.3 undecidable manual P 130 14.4744 121 0.15 72
IV.SMA1.EHZ. 2021-10-27T06:39:20.69 0.3 undecidable manual S 77 5.0949 150 0.14 74
IV.RM33.EHZ. 2021-10-27T06:39:20.30 0.1 undecidable manual P 202 13.2756 124 0.09 98
IV.T1299.HNZ. 2021-10-27T06:39:19.56 0.3 undecidable manual S 22 1.6983 169 -0.57 67
IV.SMA1.EHZ. 2021-10-27T06:39:19.36 0.1 undecidable manual P 77 5.0949 150 0.3 95
IV.T1299.HNZ. 2021-10-27T06:39:18.73 0.1 undecidable manual P 22 1.6983 169 -0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHE. ML:2.2 0.0030895349999999996 0.2816 AML other m 2021-10-27T06:39:20.80
IV.SMA1.EHN. ML:2.0 0.0018176734999999999 1.8176 AML other m 2021-10-27T06:39:20.02
IV.RM33.HNE. ML:1.6 0.0004117492 0.272 AML other m 2021-10-27T06:39:23.20
IV.RM33.EHE. ML:1.6 0.00040254595000000003 0.2176 AML other m 2021-10-27T06:39:23.21
IV.LNSS.HNE. ML:1.6 0.00030824045 0.1696 AML other m 2021-10-27T06:39:24.81
IV.LNSS.HHE. ML:1.5 0.00026537595000000004 0.1216 AML other m 2021-10-27T06:39:25.02
IV.LNSS.HHN. ML:1.5 0.00025251504999999994 1.7984 AML other m 2021-10-27T06:39:25.08
IV.RM33.HNN. ML:1.6 0.000472 0.4 AML other m 2021-10-27T06:39:25.67
IV.RM33.EHN. ML:1.6 0.0004174847 0.4192 AML other m 2021-10-27T06:39:25.68
IV.NRCA.HNE. ML:1.6 0.0002051205 0.112 AML other m 2021-10-27T06:39:27.14
IV.NRCA.HHE. ML:1.6 0.00021760625 0.1024 AML other m 2021-10-27T06:39:27.14
IV.TERO.HHN. ML:1.5 0.00018093494999999997 0.1184 AML other m 2021-10-27T06:39:27.27
IV.TERO.HNE. ML:1.6 0.00020220265000000002 0.0928 AML other m 2021-10-27T06:39:27.47
IV.TERO.HHE. ML:1.5 0.00016837360000000002 0.1216 AML other m 2021-10-27T06:39:27.52
IV.NRCA.HHN. ML:1.5 0.000158 0.12 AML other m 2021-10-27T06:39:27.65
IV.LNSS.HNN. ML:1.6 0.0002828802 0.2688 AML other m 2021-10-27T06:39:27.80
IV.GAVE.HNE. ML:1.7 0.0002364946 0.2816 AML other m 2021-10-27T06:39:28.30
IV.GAVE.EHE. ML:1.7 0.00023549999999999998 0.26 AML other m 2021-10-27T06:39:28.31
IV.NRCA.HNN. ML:1.4 0.0001485186 0.1024 AML other m 2021-10-27T06:39:28.55
IV.GAVE.EHN. ML:1.6 0.0001722648 0.1824 AML other m 2021-10-27T06:39:29.26
IV.ARRO.EHE. ML:1.2 0.00005069999999999999 0.66 AML other m 2021-10-27T06:39:33.06
IV.CESI.HHN. ML:1.2 0.00004112594 0.2784 AML other m 2021-10-27T06:39:35.80
IV.FDMO.HHN. ML:1.0 0.000029135710000000004 0.2016 AML other m 2021-10-27T06:39:36.05
IV.FDMO.HHE. ML:1.0 0.000030500685 0.3392 AML other m 2021-10-27T06:39:36.23
IV.ARRO.EHN. ML:1.1 0.000047334069999999996 0.1984 AML other m 2021-10-27T06:39:37.45
IV.CSP1.EHN. ML:1.4 0.0000594056325 0.3808 AML other m 2021-10-27T06:39:38.64
IV.CESI.HHE. ML:1.2 0.000033843245 0.3616 AML other m 2021-10-27T06:39:39.13
IV.CSP1.EHE. ML:1.5 0.00008058069 0.4192 AML other m 2021-10-27T06:39:39.38
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