Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 31-08-2018 and time 09:59:20 (Italy) in region 2 km S Amatrice (RI)

A magnitude ML 2.1 earthquake occured in region: 2 km S Amatrice (RI), on

  • 31-08-2018 07:59:20 (UTC)
  • 31-08-2018 09:59:20 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6120, 13.2820 at 12 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

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 10 667 3866
Cittareale RI 10 482 4348
Montereale AQ 10 2581 6929
Capitignano AQ 10 665 7594
Borbona RI 16 617 8211
Cagnano Amiterno AQ 18 1369 9580
Crognaleto TE 18 1297 10877
Barete AQ 18 737 11614
Arquata del Tronto AP 18 1178 12792
Posta RI 18 694 13486
Cortino TE 19 656 14142
Pizzoli AQ 20 4326 18468

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km NW of L'Aquila (69753 inhabitants)
35 Km W of Teramo (54892 inhabitants)
52 Km E of Terni (111501 inhabitants)
61 Km SE of Foligno (57155 inhabitants)
72 Km W of Montesilvano (53738 inhabitants)
78 Km W of Pescara (121014 inhabitants)
78 Km W of Chieti (51815 inhabitants)
82 Km NE of Guidonia Montecelio (88673 inhabitants)
82 Km NE of Tivoli (56533 inhabitants)
91 Km SE of Perugia (166134 inhabitants)
99 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 2018-08-31
07:59:20		 42.6118 13.2817 12 2019-04-24
14:51:14		 Bollettino Sismico Italiano INGV 66966471
Reviewed
Rev100 		ML 2.1 2018-08-31
07:59:20		 42.6097 13.2917 14 2018-08-31
08:07:34		 Sala Sismica INGV-Roma 60412451
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-08-31 07:59:20 ± 0.06
Latitude 42.6118 ± 0.0036
Longitude 13.2817 ± 0.0049
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 66966471

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 450
Semi-minor axis of confidence ellipse (meter) 106
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 247
Circular confidence region, given by single value of horizontal uncertainty (meter) 450.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 59
Number of associated phases, regardless of their use for origin computation 40
Number of defining phases 40
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) 0.02248
Epicentral distance of station farthest from the epicenter (degree) 0.75633
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 23
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 60412451
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-08-31 08:07:34

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 48
Type of magnitude ML
Reference to an origin 66966471
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-03-27 11:11:43
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.VCEL.EHZ. 2018-08-31T07:59:38.40 0.6 undecidable manual S 118 51.7038 91 1.65 23
IV.CESI.HHZ. 2018-08-31T07:59:38.01 0.3 undecidable manual S 325 53.3022 91 0.82 56
IV.FDMO.HHZ. 2018-08-31T07:59:36.39 0.6 undecidable manual S 342 49.7169 91 0.17 45
IV.MF5.EHZ. 2018-08-31T07:59:35.63 0.3 undecidable manual S 19 44.1225 91 0.88 54
IV.ARRO.EHZ. 2018-08-31T07:59:34.20 0.6 undecidable manual S 265 42.3243 91 -0.05 47
IV.INTR.HHZ. 2018-08-31T07:59:34.50 0.3 undecidable manual P 142 83.9493 91 -0.36 61
IV.EL6.EHZ. 2018-08-31T07:59:34.18 0.3 undecidable manual P 350 80.9523 91 -0.21 63
IV.FIAM.HHZ. 2018-08-31T07:59:34.00 0.6 undecidable manual S 199 40.4262 91 0.25 45
IV.ATCC.EHZ. 2018-08-31T07:59:34.66 0.1 undecidable manual P 321 82.251 91 0.06 87
IV.CERT.HHZ. 2018-08-31T07:59:33.60 0.3 undecidable manual P 199 77.5668 91 -0.27 63
IV.MC2.EHZ. 2018-08-31T07:59:32.99 0.6 undecidable manual S 347 34.0437 92 0.93 36
IV.MMO1.EHZ. 2018-08-31T07:59:31.34 0.6 undecidable manual S 7 32.1456 92 -0.19 46
IV.GIGS.HHZ. 2018-08-31T07:59:30.73 0.6 undecidable manual S 126 29.6481 92 -0.13 48
IV.VCEL.EHZ. 2018-08-31T07:59:30.04 0.1 undecidable manual P 118 51.7038 91 0.15 90
IV.T0110.HHZ. 2018-08-31T07:59:30.98 0.1 undecidable manual P 136 58.6968 91 0.02 91
IV.CSP1.EHZ. 2018-08-31T07:59:30.17 0.3 undecidable manual P 353 53.6019 91 -0.01 70
IV.FDMO.HHZ. 2018-08-31T07:59:29.26 0.1 undecidable manual P 342 49.7169 91 -0.32 88
IV.CESI.HHZ. 2018-08-31T07:59:29.88 0.1 undecidable manual P 325 53.3022 91 -0.26 88
IV.TERO.HHZ. 2018-08-31T07:59:29.62 0.6 undecidable manual S 87 26.3514 93 -0.38 45
IV.MF5.EHZ. 2018-08-31T07:59:29.00 0.1 undecidable manual P 19 44.1225 91 0.27 89
IV.NRCA.HNZ. 2018-08-31T07:59:29.99 0.6 undecidable manual S 331 28.1496 93 -0.48 44
IV.FIAM.HHZ. 2018-08-31T07:59:28.05 0.1 undecidable manual P 199 40.4262 91 -0.1 93
IV.LNSS.HHZ. 2018-08-31T07:59:28.25 0.6 undecidable manual S 267 19.7691 96 0.02 49
IV.ARRO.EHZ. 2018-08-31T07:59:28.60 0.1 undecidable manual P 265 42.3243 91 0.16 92
IV.MC2.EHZ. 2018-08-31T07:59:27.01 0.1 undecidable manual P 347 34.0437 92 -0.17 93
IV.MTRA.EHZ. 2018-08-31T07:59:27.40 0.6 undecidable manual S 30 18.5703 97 -0.54 44
IV.CAMP.HHE. 2018-08-31T07:59:26.53 0.3 undecidable manual S 129 13.3755 110 -0.05 74
IV.GIGS.HHZ. 2018-08-31T07:59:26.32 0.1 undecidable manual P 126 29.6481 92 -0.16 94
IV.MMO1.EHZ. 2018-08-31T07:59:26.68 0.1 undecidable manual P 7 32.1456 92 -0.19 93
IV.RM33.HNZ. 2018-08-31T07:59:26.51 0.6 undecidable manual S 206 12.6762 113 0.12 49
IV.TERO.HHZ. 2018-08-31T07:59:25.84 0.1 undecidable manual P 87 26.3514 93 -0.14 95
IV.NRCA.HNZ. 2018-08-31T07:59:25.99 0.1 undecidable manual P 331 28.1496 93 -0.27 92
IV.RM33.HNZ. 2018-08-31T07:59:24.05 0.1 undecidable manual P 206 12.6762 113 0.15 97
IV.T1299.HNN. 2018-08-31T07:59:24.43 0.3 undecidable manual S 1 2.4975 165 -0.18 73
IV.MTRA.EHZ. 2018-08-31T07:59:24.69 0.1 negative manual P 30 18.5703 97 -0.1 97
IV.CAMP.HHE. 2018-08-31T07:59:24.14 0.1 undecidable manual P 129 13.3755 110 0.13 97
IV.SMA1.EHZ. 2018-08-31T07:59:24.88 0.6 undecidable manual S 65 4.8951 151 0.03 51
IV.LNSS.HHZ. 2018-08-31T07:59:24.91 0.1 undecidable manual P 267 19.7691 96 -0.05 97
IV.SMA1.EHZ. 2018-08-31T07:59:23.20 0.1 negative manual P 65 4.8951 151 0.19 98
IV.T1299.HNN. 2018-08-31T07:59:22.98 0.1 undecidable manual P 1 2.4975 165 0.1 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHN. ML:2.3 0.0029950000000000003 0.16 AML other m 2018-08-31T07:59:25.16
IV.SMA1.EHE. ML:2.6 0.0056 0.38 AML other m 2018-08-31T07:59:25.25
IV.RM33.EHE. ML:2.5 0.0034950000000000003 0.82 AML other m 2018-08-31T07:59:26.64
IV.RM33.HNE. ML:2.5 0.0033200000000000005 0.82 AML other m 2018-08-31T07:59:26.64
IV.RM33.HNN. ML:2.6 0.004195 0.32 AML other m 2018-08-31T07:59:26.61
IV.RM33.EHN. ML:2.6 0.00408 0.32 AML other m 2018-08-31T07:59:26.61
IV.MTRA.EHE. ML:2.6 0.003035 0.22 AML other m 2018-08-31T07:59:27.69
IV.MTRA.EHN. ML:2.6 0.0033650000000000004 0.34 AML other m 2018-08-31T07:59:28.42
IV.LNSS.HHN. ML:2.0 0.000672 1.14 AML other m 2018-08-31T07:59:28.14
IV.LNSS.HHE. ML:2.0 0.000707 1.36 AML other m 2018-08-31T07:59:28.92
IV.TERO.HNE. ML:2.0 0.000627 0.78 AML other m 2018-08-31T07:59:29.80
IV.TERO.HHE. ML:2.3 0.001174 0.78 AML other m 2018-08-31T07:59:29.80
IV.TERO.HNN. ML:2.0 0.000484 1.58 AML other m 2018-08-31T07:59:30.85
IV.TERO.HHN. ML:2.2 0.0009075 1.48 AML other m 2018-08-31T07:59:30.80
IV.NRCA.HHN. ML:2.4 0.00118 0.96 AML other m 2018-08-31T07:59:30.15
IV.NRCA.HHE. ML:2.7 0.0023250000000000002 0.16 AML other m 2018-08-31T07:59:30.23
IV.NRCA.HNE. ML:2.6 0.00225 0.18 AML other m 2018-08-31T07:59:30.15
IV.GIGS.HHE. ML:2.0 0.000427 0.26 AML other m 2018-08-31T07:59:30.82
IV.GIGS.HHN. ML:1.6 0.0001855 1.6 AML other m 2018-08-31T07:59:31.80
IV.NRCA.HNN. ML:2.3 0.0010750000000000002 0.88 AML other m 2018-08-31T07:59:31.19
IV.FIAM.HHE. ML:1.8 0.000225 0.36 AML other m 2018-08-31T07:59:34.42
IV.FIAM.HHN. ML:1.8 0.00020500000000000002 0.28 AML other m 2018-08-31T07:59:34.24
IV.MF5.EHN. ML:2.2 0.000518 0.62 AML other m 2018-08-31T07:59:36.00
IV.ARRO.EHE. ML:1.6 0.0001255 0.66 AML other m 2018-08-31T07:59:36.72
IV.MF5.EHE. ML:2.2 0.0004465 0.5 AML other m 2018-08-31T07:59:36.50
IV.ARRO.EHN. ML:1.8 0.0001895 0.16 AML other m 2018-08-31T07:59:36.64
IV.FDMO.HHE. ML:1.8 0.0001605 0.16 AML other m 2018-08-31T07:59:37.80
IV.FDMO.HHN. ML:1.8 0.000174 0.9 AML other m 2018-08-31T07:59:38.80
IV.CESI.HHE. ML:1.8 0.00016749999999999998 0.28 AML other m 2018-08-31T07:59:38.52
IV.CESI.HHN. ML:2.2 0.0003815 0.22 AML other m 2018-08-31T07:59:38.52
IV.CSP1.EHN. ML:3.9 0.0202 1.58 AML other m 2018-08-31T07:59:39.02
IV.VCEL.EHE. ML:2.2 0.000376 0.86 AML other m 2018-08-31T07:59:40.52
IV.T0110.HHE. ML:2.0 0.00020150000000000002 0.84 AML other m 2018-08-31T07:59:40.44
IV.VCEL.EHN. ML:2.3 0.00047799999999999996 0.42 AML other m 2018-08-31T07:59:40.75
IV.CSP1.EHE. ML:1.8 0.00013900000000000002 0.56 AML other m 2018-08-31T07:59:40.36
IV.T0110.HHN. ML:2.1 0.000287 0.92 AML other m 2018-08-31T07:59:41.47
IV.PTQR.HHE. ML:1.3 0.00003435 1.4 AML other m 2018-08-31T07:59:43.73
IV.ASSB.HHN. ML:1.9 0.000142 0.46 AML other m 2018-08-31T07:59:43.75
IV.PTQR.HHN. ML:1.2 0.00003095 0.78 AML other m 2018-08-31T07:59:46.28
IV.ASSB.HHE. ML:2.0 0.00016749999999999998 0.38 AML other m 2018-08-31T07:59:47.28
IV.CERT.HHN. ML:1.7 0.0000726 0.4 AML other m 2018-08-31T07:59:48.35
IV.ATCC.EHE. ML:1.9 0.000117 1.62 AML other m 2018-08-31T07:59:50.87
IV.ATCC.EHN. ML:1.9 0.0000965 0.38 AML other m 2018-08-31T07:59:51.11
IV.CERT.HHE. ML:1.9 0.0001061 0.58 AML other m 2018-08-31T07:59:51.55
IV.LPEL.HHE. ML:1.9 0.0000739 1.68 AML other m 2018-08-31T07:59:52.15
IV.INTR.HHE. ML:1.6 0.000044899999999999994 0.64 AML other m 2018-08-31T07:59:53.85
IV.LPEL.HHN. ML:1.8 0.00005795 0.7 AML other m 2018-08-31T07:59:54.63
IV.INTR.HHN. ML:1.8 0.0000791 1.08 AML other m 2018-08-31T07:59:55.40
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