Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 08-02-2021 and time 05:37:47 (Italy) in region 3 km NE Accumoli (RI)

A magnitude ML 1.8 earthquake occured in region: 3 km NE Accumoli (RI), on

  • 08-02-2021 04:37:47 (UTC)
  • 08-02-2021 05:37:47 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7240, 13.2610 at 10 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
Accumoli RI 3 667 667
Arquata del Tronto AP 6 1178 1845
Amatrice RI 11 2657 4502
Acquasanta Terme AP 13 2916 7418
Cittareale RI 14 482 7900
Montegallo AP 15 523 8423
Norcia PG 16 4957 13380
Valle Castellana TE 19 977 14357

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km W of Teramo (54892 inhabitants)
43 Km N of L'Aquila (69753 inhabitants)
52 Km SE of Foligno (57155 inhabitants)
53 Km E of Terni (111501 inhabitants)
76 Km W of Montesilvano (53738 inhabitants)
83 Km SE of Perugia (166134 inhabitants)
83 Km W of Pescara (121014 inhabitants)
85 Km W of Chieti (51815 inhabitants)
92 Km NE of Guidonia Montecelio (88673 inhabitants)
93 Km NE of Tivoli (56533 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 1.8 2021-02-08
04:37:47		 42.7243 13.2612 10 2021-07-12
16:54:57		 Bollettino Sismico Italiano INGV 86929261
Reviewed
Rev100 		ML 1.8 2021-02-08
04:37:48		 42.7288 13.2618 10 2021-02-08
04:45:41		 Sala Sismica INGV-Roma 86922631
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-08 04:37:47 ± 0.04
Latitude 42.7243 ± 0.0018
Longitude 13.2612 ± 0.0037
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86929261

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 260
Semi-minor axis of confidence ellipse (meter) 219
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 229
Circular confidence region, given by single value of horizontal uncertainty (meter) 260.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 44
Number of associated phases, regardless of their use for origin computation 50
Number of defining phases 45
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.54409
Number of stations at which the event was observed 28
Number of stations from which data was used for origin computation 23
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 50
Type of magnitude ML
Reference to an origin 86922631
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-08 04:45:41

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 50
Type of magnitude ML
Reference to an origin 86929261
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-02-08 09:44:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CELB.HHZ. 2021-02-08T04:38:55.41 3.0 undecidable manual Sn 1.66 0
IV.BSSO.HNZ. 2021-02-08T04:38:39.76 3.0 undecidable manual S 3.08 0
IV.RIBO.EHZ.01 2021-02-08T04:38:38.99 3.0 undecidable manual Sn -0.02 0
IV.IFOR.HHZ. 2021-02-08T04:38:27.54 3.0 undecidable manual Pg 5.05 0
IV.ARVD.HHZ. 2021-02-08T04:38:16.68 3.0 undecidable manual S 0.04 0
IV.ASSB.HHZ. 2021-02-08T04:38:07.00 0.3 undecidable manual S 306 60.3951 50 0.15 67
IV.MOMA.HHZ. 2021-02-08T04:38:06.38 0.6 undecidable manual S 279 56.9985 50 0.44 42
MN.AQU.HNN. 2021-02-08T04:38:02.25 0.3 undecidable manual S 164 42.7239 50 0.11 70
IV.CESI.HHZ. 2021-02-08T04:38:02.12 0.3 undecidable manual S 317 42.5241 50 0.03 71
IV.SAP2.EHZ. 2021-02-08T04:38:02.65 0.6 undecidable manual S 15 42.8238 50 0.49 43
IV.GIGS.HHN. 2021-02-08T04:38:01.30 0.3 undecidable manual S 140 39.4272 50 0.05 71
IV.GUMA.HHZ. 2021-02-08T04:38:01.49 0.3 undecidable manual S 9 38.0286 50 0.61 62
IV.ARRO.EHZ. 2021-02-08T04:38:01.84 0.3 undecidable manual S 248 43.5231 50 -0.51 64
IV.CSP1.EHZ. 2021-02-08T04:38:01.62 0.3 undecidable manual S 354 41.0256 50 -0.07 70
IV.MF5.EHZ. 2021-02-08T04:38:00.13 0.6 undecidable manual S 29 33.3444 50 0.48 44
IT.MTCL.HGZ. 2021-02-08T04:38:00.23 0.3 undecidable manual S 325 36.741 50 -0.3 68
IV.FDMO.HHZ. 2021-02-08T04:38:00.67 0.3 undecidable manual S 338 37.4292 50 -0.05 71
IV.TERO.HHZ. 2021-02-08T04:37:58.31 0.3 undecidable manual S 112 30.1476 50 -0.47 66
IV.MOMA.HHZ. 2021-02-08T04:37:58.50 0.1 undecidable manual P 279 56.9985 50 0.16 90
IV.GAVE.EHZ. 2021-02-08T04:37:58.73 0.3 undecidable manual S 263 30.1476 50 -0.04 72
IV.ASSB.HHZ. 2021-02-08T04:37:58.72 0.1 undecidable manual P 306 60.3951 50 -0.15 89
IV.MNTT.EHZ. 2021-02-08T04:37:57.15 0.1 undecidable manual P 36 46.3203 50 0.45 86
IV.RM33.EHZ. 2021-02-08T04:37:57.20 0.6 undecidable manual S 189 24.1536 112 0.19 47
IV.CAMP.HHZ. 2021-02-08T04:37:56.74 0.3 undecidable manual S 150 24.1536 112 -0.25 70
IV.ARRO.EHZ. 2021-02-08T04:37:56.28 0.1 undecidable manual P 248 43.5231 50 0.01 95
IV.CESI.HHZ. 2021-02-08T04:37:56.00 0.1 undecidable manual P 317 42.5241 50 -0.12 93
IV.SAP2.EHZ. 2021-02-08T04:37:56.20 0.1 undecidable manual P 15 42.8238 50 0.04 94
IV.LNSS.HHZ. 2021-02-08T04:37:56.64 0.3 undecidable manual S 233 22.4553 113 0.18 71
IV.GIGS.HHN. 2021-02-08T04:37:55.50 0.1 undecidable manual P 140 39.4272 50 -0.14 93
IV.GUMA.HHZ. 2021-02-08T04:37:55.57 0.1 positive manual P 9 38.0286 50 0.15 93
IV.CSP1.EHZ. 2021-02-08T04:37:55.77 0.1 undecidable manual P 354 41.0256 50 -0.12 93
MN.AQU.HNN. 2021-02-08T04:37:55.60 1.0 undecidable manual P 164 42.7239 50 -0.55 21
IV.MMO1.EHZ. 2021-02-08T04:37:55.69 0.3 undecidable manual S 15 20.1687 116 -0.03 74
IT.MTCL.HGZ. 2021-02-08T04:37:55.04 0.1 undecidable manual P 325 36.741 50 -0.18 92
IV.FDMO.HHZ. 2021-02-08T04:37:55.13 0.1 undecidable manual P 338 37.4292 50 -0.2 92
IV.GAVE.EHZ. 2021-02-08T04:37:54.11 0.1 positive manual P 263 30.1476 50 -0.1 95
IV.NRCA.HHZ. 2021-02-08T04:37:54.36 0.3 undecidable manual S 315 16.9719 120 -0.4 69
IV.MF5.EHZ. 2021-02-08T04:37:54.87 0.1 positive manual P 29 33.3444 50 0.16 93
IV.TERO.HHZ. 2021-02-08T04:37:53.93 0.1 undecidable manual P 112 30.1476 50 -0.28 92
IV.SMA1.EHZ. 2021-02-08T04:37:53.25 0.3 undecidable manual S 150 12.0768 129 -0.07 74
IV.LNSS.HHZ. 2021-02-08T04:37:53.01 0.1 positive manual P 233 22.4553 113 0.14 96
IV.CAMP.HHZ. 2021-02-08T04:37:53.08 0.1 undecidable manual P 150 24.1536 112 -0.1 96
IV.RM33.EHZ. 2021-02-08T04:37:53.40 0.1 undecidable manual P 189 24.1536 112 0.22 94
IV.T1299.HNZ. 2021-02-08T04:37:53.13 0.3 undecidable manual S 170 10.1787 134 0.3 71
IV.MMO1.EHZ. 2021-02-08T04:37:52.32 0.1 undecidable manual P 15 20.1687 116 -0.12 96
IV.MTRA.EHZ. 2021-02-08T04:37:52.84 0.3 undecidable manual S 72 11.5773 130 -0.37 70
IV.T1299.HNZ. 2021-02-08T04:37:51.10 0.1 negative manual P 170 10.1787 134 0.33 94
IV.SMA1.EHZ. 2021-02-08T04:37:51.22 0.1 undecidable manual P 150 12.0768 129 0.16 97
IV.NRCA.HHZ. 2021-02-08T04:37:51.81 0.1 positive manual P 315 16.9719 120 -0.08 98
IV.MTRA.EHZ. 2021-02-08T04:37:50.98 0.1 positive manual P 72 11.5773 130 -0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.HNN. ML:1.9 0.0008628667 1.8208 AML other m 2021-02-08T04:37:53.06
IV.MTRA.EHN. ML:1.8 0.0008368666 1.8208 AML other m 2021-02-08T04:37:53.06
IV.SMA1.EHN. ML:1.9 0.0009218438500000001 0.1792 AML other m 2021-02-08T04:37:53.46
IV.SMA1.EHE. ML:1.7 0.00058441805 0.1184 AML other m 2021-02-08T04:37:53.71
IV.MTRA.HNE. ML:2.0 0.00119230195 0.0992 AML other m 2021-02-08T04:37:53.77
IV.MTRA.EHE. ML:2.0 0.00121580525 0.0992 AML other m 2021-02-08T04:37:53.77
IV.NRCA.HHN. ML:1.9 0.000665 0.12 AML other m 2021-02-08T04:37:55.01
IV.NRCA.HNN. ML:1.8 0.0006081188 0.0992 AML other m 2021-02-08T04:37:55.01
IV.NRCA.HNE. ML:1.9 0.0006584316 0.0704 AML other m 2021-02-08T04:37:55.30
IV.NRCA.HHE. ML:1.9 0.00069696585 0.08 AML other m 2021-02-08T04:37:56.11
IV.LNSS.HHE. ML:2.1 0.0007709861 0.2016 AML other m 2021-02-08T04:37:56.97
IV.LNSS.HNE. ML:2.1 0.00075325095 0.2016 AML other m 2021-02-08T04:37:56.98
IV.LNSS.HNN. ML:2.1 0.0008115 0.16 AML other m 2021-02-08T04:37:57.27
IV.LNSS.HHN. ML:2.1 0.000844 0.18 AML other m 2021-02-08T04:37:57.27
IV.RM33.HNE. ML:1.3 0.000114828415 1.2896 AML other m 2021-02-08T04:37:57.32
IV.RM33.EHN. ML:1.2 0.000092080675 0.3616 AML other m 2021-02-08T04:37:58.27
IV.TERO.HHN. ML:2.0 0.00047505949999999996 0.1216 AML other m 2021-02-08T04:37:58.57
IV.TERO.HNN. ML:2.1 0.0005565 0.12 AML other m 2021-02-08T04:37:58.58
IV.TERO.HHE. ML:1.7 0.0002662815 0.1216 AML other m 2021-02-08T04:37:58.92
IV.TERO.HNE. ML:1.7 0.0002485136 0.1376 AML other m 2021-02-08T04:37:58.93
IV.GAVE.HNE. ML:2.2 0.0008669476000000001 0.1376 AML other m 2021-02-08T04:37:59.74
IV.GAVE.EHE. ML:2.3 0.000989 0.14 AML other m 2021-02-08T04:37:59.75
IV.GAVE.EHN. ML:2.4 0.00120136 0.16 AML other m 2021-02-08T04:37:59.77
IV.GAVE.HNN. ML:1.9 0.00040044725000000004 0.1792 AML other m 2021-02-08T04:37:59.85
IV.RM33.HNN. ML:1.3 0.00013565923 1.5296 AML other m 2021-02-08T04:38:00.05
IV.RM33.EHE. ML:1.3 0.000114764695 0.3808 AML other m 2021-02-08T04:38:00.96
IV.FDMO.HHE. ML:1.4 0.00009285000000000001 0.16 AML other m 2021-02-08T04:38:01.13
IV.MF5.EHN. ML:1.6 0.000181169185 0.72 AML other m 2021-02-08T04:38:01.10
IV.MF5.EHE. ML:1.6 0.0001776992 0.1824 AML other m 2021-02-08T04:38:01.07
IV.FDMO.HHN. ML:1.5 0.00011237326000000001 0.16 AML other m 2021-02-08T04:38:01.27
IV.GUMA.HNE. ML:2.5 0.0010474999999999998 1.72 AML other m 2021-02-08T04:38:01.97
IV.GUMA.HHE. ML:2.5 0.0012684755 1.7792 AML other m 2021-02-08T04:38:01.10
IV.CESI.HHE. ML:1.5 0.000110103025 0.2016 AML other m 2021-02-08T04:38:02.57
IV.CESI.HNE. ML:1.6 0.00012282557999999998 0.1824 AML other m 2021-02-08T04:38:02.56
IV.GUMA.HNN. ML:2.2 0.00058739455 0.2976 AML other m 2021-02-08T04:38:02.60
IV.GUMA.HHN. ML:2.3 0.000751 0.28 AML other m 2021-02-08T04:38:02.60
IV.CESI.HHN. ML:1.9 0.00023249999999999999 0.36 AML other m 2021-02-08T04:38:02.77
IV.CESI.HNN. ML:1.9 0.00023905284999999998 0.3584 AML other m 2021-02-08T04:38:02.78
IV.CSP1.EHE. ML:1.7 0.000167268455 0.24 AML other m 2021-02-08T04:38:02.98
IV.SAP2.EHE. ML:1.5 0.000095991905 0.1408 AML other m 2021-02-08T04:38:03.59
IV.CSP1.EHN. ML:1.9 0.0002522795 0.3008 AML other m 2021-02-08T04:38:03.86
IV.SAP2.EHN. ML:2.3 0.0006975 0.68 AML other m 2021-02-08T04:38:05.68
IV.MOMA.HNN. ML:1.9 0.00017317155 1.1008 AML other m 2021-02-08T04:38:06.87
IV.ASSB.HHE. ML:1.5 0.000071167975 0.2592 AML other m 2021-02-08T04:38:07.58
IV.ASSB.HHN. ML:1.4 0.00005225246 0.1792 AML other m 2021-02-08T04:38:07.53
IV.MOMA.HNE. ML:1.7 0.00010013538 0.5696 AML other m 2021-02-08T04:38:08.00
IV.MNTT.EHE. ML:1.8 0.0001840515 0.1408 AML other m 2021-02-08T04:38:08.66
IV.MOMA.HHN. ML:1.6 0.000080855545 0.16 AML other m 2021-02-08T04:38:09.36
IV.MOMA.HHE. ML:1.6 0.00009270249 0.1824 AML other m 2021-02-08T04:38:10.15
IV.MNTT.EHN. ML:2.0 0.00025441725000000003 0.4416 AML other m 2021-02-08T04:38:11.72
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