Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.0 on date 18-07-2021 and time 05:51:09 (Italy) in region 5 km N Acquasanta Terme (AP)

A magnitude ML 2.0 earthquake occured in region: 5 km N Acquasanta Terme (AP), on

  • 18-07-2021 03:51:09 (UTC)
  • 18-07-2021 05:51:09 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8120, 13.3990 at 24 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
Acquasanta Terme AP 5 2916 2916
Montegallo AP 6 523 3439
Roccafluvione AP 8 2010 5449
Arquata del Tronto AP 9 1178 6627
Palmiano AP 11 196 6823
Venarotta AP 11 2066 8889
Montemonaco AP 12 604 9493
Valle Castellana TE 12 977 10470
Ascoli Piceno AP 15 49407 59877
Montefortino FM 15 1178 61055
Comunanza AP 16 3166 64221
Rocca Santa Maria TE 17 537 64758
Accumoli RI 18 667 65425
Force AP 19 1354 66779
Folignano AP 19 9241 76020
Amandola FM 19 3629 79649

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km NW of Teramo (54892 inhabitants)
51 Km N of L'Aquila (69753 inhabitants)
59 Km E of Foligno (57155 inhabitants)
67 Km E of Terni (111501 inhabitants)
70 Km W of Montesilvano (53738 inhabitants)
77 Km NW of Pescara (121014 inhabitants)
81 Km NW of Chieti (51815 inhabitants)
89 Km E of Perugia (166134 inhabitants)
90 Km S of Ancona (100861 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 2.0 2021-07-18
03:51:09		 42.8115 13.3993 24 2021-12-29
11:12:47		 Bollettino Sismico Italiano INGV 97176531
Reviewed
Rev100 		ML 2.0 2021-07-18
03:51:09		 42.8117 13.3957 24 2021-07-18
03:57:57		 Sala Sismica INGV-Roma 92897101
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-18 03:51:09 ± 0.09
Latitude 42.8115 ± 0.0036
Longitude 13.3993 ± 0.0061
Depth (km) 24 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 97176531

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 510
Semi-minor axis of confidence ellipse (meter) 86
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 66
Circular confidence region, given by single value of horizontal uncertainty (meter) 510.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 51
Number of associated phases, regardless of their use for origin computation 63
Number of defining phases 60
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.03242
Number of stations at which the event was observed 39
Number of stations from which data was used for origin computation 36
Magnitudes information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations 48
Type of magnitude ML
Reference to an origin 92897101
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-18 03:57:57

ML:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations 48
Type of magnitude ML
Reference to an origin 97176531
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-11-02 20:30:53
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IX.SNR3.EHZ.02 2021-07-18T03:52:21.78 3.0 undecidable manual Sn 4.48 0
OT.OT14.EHZ. 2021-07-18T03:52:12.38 3.0 undecidable manual Sn 4.76 0
IV.CMIS.HHZ. 2021-07-18T03:51:48.62 3.0 negative manual Pg 6.37 0
IV.FOSV.EHZ. 2021-07-18T03:51:33.08 0.6 undecidable manual S 316 74.4699 102 0.88 35
IV.ASSB.HHZ. 2021-07-18T03:51:30.51 0.6 undecidable manual S 293 65.3901 104 0.68 39
IV.APEC.HHZ. 2021-07-18T03:51:29.05 0.6 undecidable manual P 317 114.5964 97 0.34 39
IV.EL6.EHZ. 2021-07-18T03:51:29.82 0.3 undecidable manual S 337 62.2932 105 0.79 56
IV.ARRO.EHZ. 2021-07-18T03:51:28.86 0.6 undecidable manual S 244 57.6978 106 1.01 34
IV.NARO.HHZ. 2021-07-18T03:51:28.00 0.3 undecidable manual P 324 110.7003 98 -0.1 62
IV.PIEI.HHZ. 2021-07-18T03:51:27.21 0.3 undecidable manual P 319 106.5156 98 -0.26 60
IV.MML1.EHZ. 2021-07-18T03:51:25.76 0.3 undecidable manual S 314 48.2184 109 0.32 67
IV.FRON.EHZ. 2021-07-18T03:51:25.55 0.3 undecidable manual P 325 95.4378 99 -0.23 62
IV.CESI.HHZ. 2021-07-18T03:51:25.12 0.6 undecidable manual S 298 45.5211 111 0.36 44
IV.GAVE.EHZ. 2021-07-18T03:51:24.89 0.6 undecidable manual S 252 43.2234 112 0.71 39
IV.MURB.HHZ. 2021-07-18T03:51:24.50 0.3 undecidable manual P 306 86.8464 100 0.03 66
IV.RM33.EHZ. 2021-07-18T03:51:23.15 0.6 undecidable manual S 204 36.8298 116 0.54 42
IV.PF6.EHN. 2021-07-18T03:51:23.15 0.6 undecidable manual S 335 39.8268 114 -0.2 46
IV.FOSV.EHZ. 2021-07-18T03:51:22.41 0.1 negative manual P 316 74.4699 102 -0.19 87
IT.MTCL.HGZ. 2021-07-18T03:51:22.94 0.3 undecidable manual S 302 38.3283 115 -0.03 73
IV.ATCC.EHZ. 2021-07-18T03:51:22.48 0.1 undecidable manual P 304 74.2701 102 -0.09 89
IV.CSP1.EHZ. 2021-07-18T03:51:22.23 0.6 undecidable manual S 333 34.8429 118 0.07 48
IV.T0110.HHZ. 2021-07-18T03:51:22.10 0.1 undecidable manual P 154 71.5728 102 -0.06 90
IV.FDMO.HHZ. 2021-07-18T03:51:22.17 0.6 undecidable manual S 315 35.5422 117 -0.15 47
IV.MNTT.EHZ. 2021-07-18T03:51:22.48 0.6 undecidable manual S 30 32.0457 120 0.99 36
IV.SAP2.EHZ. 2021-07-18T03:51:21.62 0.6 undecidable manual S 360 31.6461 121 0.22 47
IV.CAMP.HHE. 2021-07-18T03:51:21.31 0.6 undecidable manual S 179 30.5472 122 0.15 47
IV.FEMA.HNE. 2021-07-18T03:51:21.92 0.6 undecidable manual S 301 32.9448 119 0.21 47
IV.OFFI.HHZ. 2021-07-18T03:51:21.40 0.6 undecidable manual S 59 27.0507 125 1.03 35
IV.ASSB.HHZ. 2021-07-18T03:51:21.05 0.1 undecidable manual P 293 65.3901 104 -0.19 89
IV.CING.HHZ. 2021-07-18T03:51:20.68 0.3 undecidable manual P 345 64.6908 104 -0.45 63
IV.TERO.HHZ. 2021-07-18T03:51:20.09 0.6 undecidable manual S 141 26.751 126 -0.22 48
IV.ARRO.EHZ. 2021-07-18T03:51:20.25 0.3 undecidable manual P 244 57.6978 106 0.16 68
IV.GUMA.HHZ. 2021-07-18T03:51:20.82 0.3 undecidable manual S 349 28.3494 124 0.16 72
IV.EL6.EHZ. 2021-07-18T03:51:20.41 0.3 undecidable manual P 337 62.2932 105 -0.36 64
IV.VCEL.EHZ. 2021-07-18T03:51:20.17 0.3 undecidable manual P 142 58.5969 106 -0.06 69
IV.FAGN.HHZ. 2021-07-18T03:51:20.99 0.3 undecidable manual P 166 62.3931 104 0.2 67
IV.NRCA.HNZ. 2021-07-18T03:51:19.63 0.6 undecidable manual S 276 23.3544 130 0.04 49
IV.MC2.EHZ. 2021-07-18T03:51:19.15 0.6 undecidable manual S 303 20.3685 135 0.14 48
IV.SMA1.EHZ. 2021-07-18T03:51:19.00 0.6 undecidable manual S 195 20.7681 134 -0.08 50
IV.GAVE.EHZ. 2021-07-18T03:51:18.09 0.1 undecidable manual P 252 43.2234 112 0.11 94
IV.TRTR.HHE. 2021-07-18T03:51:18.86 0.3 undecidable manual P 90 41.8248 113 1.08 51
IV.CESI.HHZ. 2021-07-18T03:51:18.22 0.1 negative manual P 298 45.5211 111 -0.09 94
IV.MML1.EHZ. 2021-07-18T03:51:18.45 0.1 undecidable manual P 314 48.2184 109 -0.25 90
IV.GIGS.HJZ. 2021-07-18T03:51:17.57 0.3 undecidable manual P 160 42.2244 113 -0.26 69
IV.MMO1.EHZ. 2021-07-18T03:51:17.02 0.6 undecidable manual S 329 11.3775 151 -0.54 46
IT.MTCL.HGZ. 2021-07-18T03:51:17.01 0.3 undecidable manual P 302 38.3283 115 -0.27 69
IV.RM33.EHZ. 2021-07-18T03:51:17.17 0.1 positive manual P 204 36.8298 116 0.1 95
IV.PF6.EHN. 2021-07-18T03:51:17.03 0.1 undecidable manual P 335 39.8268 114 -0.47 87
IV.FDMO.HHZ. 2021-07-18T03:51:16.58 0.1 undecidable manual P 315 35.5422 117 -0.32 91
IV.FEMA.HNE. 2021-07-18T03:51:16.39 0.3 undecidable manual P 301 32.9448 119 -0.16 71
IV.MTRA.HNZ. 2021-07-18T03:51:16.64 0.6 undecidable manual S 182 6.0939 164 -0.38 48
IV.OFFI.HHZ. 2021-07-18T03:51:16.06 0.3 undecidable manual P 59 27.0507 125 0.29 70
IV.MNTT.EHZ. 2021-07-18T03:51:16.60 0.1 positive manual P 30 32.0457 120 0.17 95
IV.SAP2.EHZ. 2021-07-18T03:51:16.38 0.3 undecidable manual P 360 31.6461 121 0.01 74
IV.CSP1.EHZ. 2021-07-18T03:51:16.52 0.1 negative manual P 333 34.8429 118 -0.29 92
IV.CAMP.HHE. 2021-07-18T03:51:16.15 0.1 undecidable manual P 179 30.5472 122 -0.08 97
IV.GUMA.HHZ. 2021-07-18T03:51:15.83 0.1 negative manual P 349 28.3494 124 -0.11 96
IV.SMA1.EHZ. 2021-07-18T03:51:15.06 0.1 positive manual P 195 20.7681 134 0.03 99
IV.NRCA.HNZ. 2021-07-18T03:51:15.23 0.1 undecidable manual P 276 23.3544 130 -0.09 98
IV.TERO.HHZ. 2021-07-18T03:51:15.53 0.1 undecidable manual P 141 26.751 126 -0.21 95
IV.MC2.EHZ. 2021-07-18T03:51:14.97 0.1 undecidable manual P 303 20.3685 135 -0.02 100
IV.MTRA.HNZ. 2021-07-18T03:51:13.63 0.1 undecidable manual P 182 6.0939 164 -0.21 99
IV.MMO1.EHZ. 2021-07-18T03:51:13.81 0.1 undecidable manual P 329 11.3775 151 -0.34 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.HNN. ML:1.9 0.0004715 0.66 AML other m 2021-07-18T03:51:17.13
IV.MTRA.EHN. ML:1.8 0.00045850000000000003 0.66 AML other m 2021-07-18T03:51:17.47
IV.MTRA.HNE. ML:2.0 0.0006285 0.22 AML other m 2021-07-18T03:51:17.88
IV.MTRA.EHE. ML:1.9 0.0005875 0.2 AML other m 2021-07-18T03:51:17.88
IV.SMA1.EHE. ML:2.2 0.000801 0.08 AML other m 2021-07-18T03:51:19.37
IV.SMA1.EHN. ML:2.1 0.0006265000000000001 0.1 AML other m 2021-07-18T03:51:19.41
IV.NRCA.HNN. ML:2.9 0.0036 0.16 AML other m 2021-07-18T03:51:19.80
IV.NRCA.HHN. ML:3.0 0.004045 0.18 AML other m 2021-07-18T03:51:19.79
IV.NRCA.HNE. ML:2.7 0.0024950000000000003 0.1 AML other m 2021-07-18T03:51:19.88
IV.NRCA.HHE. ML:2.8 0.002545 0.1 AML other m 2021-07-18T03:51:19.93
IV.GUMA.HNE. ML:2.2 0.0006619999999999999 0.82 AML other m 2021-07-18T03:51:21.19
IV.GUMA.HNN. ML:2.6 0.0014750000000000002 1.2 AML other m 2021-07-18T03:51:21.39
IV.GUMA.HHN. ML:2.3 0.000829 0.38 AML other m 2021-07-18T03:51:21.59
IV.GUMA.HHE. ML:2.2 0.000652 1.16 AML other m 2021-07-18T03:51:21.36
IV.SAP2.EHN. ML:3.0 0.003685 1.88 AML other m 2021-07-18T03:51:21.03
IV.SAP2.EHE. ML:2.1 0.000508 1.14 AML other m 2021-07-18T03:51:22.98
IV.CSP1.EHE. ML:2.4 0.0008449999999999999 0.42 AML other m 2021-07-18T03:51:22.50
IV.CSP1.EHN. ML:2.5 0.001017 0.44 AML other m 2021-07-18T03:51:22.51
IV.FDMO.HHE. ML:1.8 0.000227 0.14 AML other m 2021-07-18T03:51:22.59
IV.FDMO.HHN. ML:2.0 0.0003175 0.14 AML other m 2021-07-18T03:51:22.60
IV.OFFI.HHN. ML:1.8 0.0002705 1.4 AML other m 2021-07-18T03:51:22.04
IV.MNTT.EHE. ML:2.6 0.0014 0.12 AML other m 2021-07-18T03:51:23.44
IV.RM33.EHN. ML:2.0 0.0003325 0.16 AML other m 2021-07-18T03:51:23.69
IV.RM33.HNN. ML:2.0 0.00033850000000000004 0.16 AML other m 2021-07-18T03:51:23.69
IV.RM33.EHE. ML:2.0 0.0003415 0.82 AML other m 2021-07-18T03:51:24.20
IV.RM33.HNE. ML:2.1 0.00038849999999999996 1.34 AML other m 2021-07-18T03:51:24.20
IV.OFFI.HHE. ML:2.0 0.00039449999999999994 0.54 AML other m 2021-07-18T03:51:25.32
IV.CESI.HHE. ML:2.1 0.00029749999999999997 0.44 AML other m 2021-07-18T03:51:25.57
IV.GAVE.EHN. ML:2.2 0.00047450000000000004 0.32 AML other m 2021-07-18T03:51:25.24
IV.CESI.HHN. ML:2.2 0.00040849999999999995 0.12 AML other m 2021-07-18T03:51:25.56
IV.GAVE.EHE. ML:2.2 0.0004295 1.6 AML other m 2021-07-18T03:51:25.07
IV.MML1.EHN. ML:2.0 0.000234 1.28 AML other m 2021-07-18T03:51:26.66
IV.MML1.EHE. ML:1.6 0.0001065 1.18 AML other m 2021-07-18T03:51:26.63
IV.MNTT.EHN. ML:2.1 0.0004165 0.24 AML other m 2021-07-18T03:51:26.95
IV.ARRO.EHN. ML:1.7 0.00009285000000000001 0.18 AML other m 2021-07-18T03:51:29.07
IV.VCEL.EHE. ML:2.1 0.00024249999999999999 1.04 AML other m 2021-07-18T03:51:29.38
IV.VCEL.EHN. ML:2.0 0.0002155 1.28 AML other m 2021-07-18T03:51:30.18
IV.ARRO.EHE. ML:1.6 0.00007594999999999999 0.16 AML other m 2021-07-18T03:51:31.28
IV.ASSB.HHE. ML:1.7 0.00009054999999999999 0.3 AML other m 2021-07-18T03:51:31.99
IV.ASSB.HHN. ML:1.8 0.00011649999999999999 0.2 AML other m 2021-07-18T03:51:32.76
IV.T0110.HHE. ML:1.7 0.00008075 0.4 AML other m 2021-07-18T03:51:34.26
IV.T0110.HHN. ML:1.8 0.00008815 0.58 AML other m 2021-07-18T03:51:34.63
IV.FAGN.HHN. ML:1.8 0.000124 0.64 AML other m 2021-07-18T03:51:36.65
IV.FAGN.HHE. ML:1.9 0.00014450000000000002 0.42 AML other m 2021-07-18T03:51:38.05
IV.MURB.HHE. ML:2.0 0.0001126 0.34 AML other m 2021-07-18T03:51:41.76
IV.MURB.HHN. ML:1.9 0.00008760000000000002 1.42 AML other m 2021-07-18T03:51:42.00
IV.PIEI.HHE. ML:1.5 0.0000281 1.38 AML other m 2021-07-18T03:51:47.95
IV.PIEI.HHN. ML:1.5 0.0000295 1.16 AML other m 2021-07-18T03:51:47.03
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