Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 29-01-2021 and time 06:13:02 (Italy) in region 4 km N Acquasanta Terme (AP)

A magnitude ML 1.8 earthquake occured in region: 4 km N Acquasanta Terme (AP), on

  • 29-01-2021 05:13:02 (UTC)
  • 29-01-2021 06:13:02 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8090, 13.4090 at 22 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 4 2916 2916
Montegallo AP 7 523 3439
Roccafluvione AP 8 2010 5449
Arquata del Tronto AP 10 1178 6627
Venarotta AP 11 2066 8693
Valle Castellana TE 11 977 9670
Palmiano AP 11 196 9866
Montemonaco AP 12 604 10470
Ascoli Piceno AP 15 49407 59877
Montefortino FM 16 1178 61055
Comunanza AP 17 3166 64221
Rocca Santa Maria TE 17 537 64758
Accumoli RI 18 667 65425
Folignano AP 18 9241 74666
Force AP 19 1354 76020
Amandola FM 20 3629 79649

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km NW of Teramo (54892 inhabitants)
51 Km N of L'Aquila (69753 inhabitants)
60 Km E of Foligno (57155 inhabitants)
68 Km E of Terni (111501 inhabitants)
69 Km W of Montesilvano (53738 inhabitants)
76 Km NW of Pescara (121014 inhabitants)
80 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 1.8 2021-01-29
05:13:02		 42.8088 13.4092 22 2021-07-12
16:54:57		 Bollettino Sismico Italiano INGV 86937691
Reviewed
Rev100 		ML 1.7 2021-01-29
05:13:02		 42.8065 13.3833 20 2021-01-29
05:20:43		 Sala Sismica INGV-Roma 86672961
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-29 05:13:02 ± 0.08
Latitude 42.8088 ± 0.0027
Longitude 13.4092 ± 0.0049
Depth (km) 22 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86937691

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 409
Semi-minor axis of confidence ellipse (meter) 46
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 261
Circular confidence region, given by single value of horizontal uncertainty (meter) 410.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 84
Number of associated phases, regardless of their use for origin computation 41
Number of defining phases 39
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.61514
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 21
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 86672961
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-29 05:20:43

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 86937691
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-03-09 11:25:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SSP9.EHZ. 2021-01-29T05:13:24.90 3.0 positive manual P 0.09 0
IV.APEC.HHZ. 2021-01-29T05:13:23.73 3.0 negative manual P 1.18 0
IV.MML1.HNE. 2021-01-29T05:13:19.00 0.3 undecidable manual S 314 49.0176 106 0.29 68
IV.CESI.HHZ. 2021-01-29T05:13:18.41 0.6 undecidable manual S 298 46.4202 107 0.38 45
IV.GAVE.EHZ. 2021-01-29T05:13:17.49 0.3 undecidable manual S 253 43.9227 108 0.09 71
IV.LNSS.HHZ. 2021-01-29T05:13:16.17 0.3 undecidable manual S 233 37.7289 112 0.32 68
IT.MTCL.HGZ. 2021-01-29T05:13:16.06 0.3 undecidable manual S 302 39.1275 111 -0.13 70
IV.GIGS.HHN. 2021-01-29T05:13:16.64 0.3 undecidable manual S 161 41.625 109 -0.19 71
IV.RM33.EHZ. 2021-01-29T05:13:15.89 0.6 undecidable manual S 206 36.8298 112 0.26 46
IV.CSP1.EHZ. 2021-01-29T05:13:15.40 0.3 undecidable manual S 332 35.5422 113 0.1 73
IV.FDMO.HHZ. 2021-01-29T05:13:15.38 0.3 undecidable manual S 314 36.3414 112 -0.12 71
IV.GUMA.HHZ. 2021-01-29T05:13:14.04 0.3 undecidable manual S 348 28.749 119 0.35 70
IV.SAP2.EHE. 2021-01-29T05:13:14.81 0.3 undecidable manual S 359 31.9458 116 0.38 69
IV.MOMA.HHZ. 2021-01-29T05:13:14.87 0.3 undecidable manual P 270 68.2761 101 0 69
IV.CAMP.HHE. 2021-01-29T05:13:14.12 0.3 undecidable manual S 180 30.2475 118 0.08 72
IV.T1299.EHZ. 2021-01-29T05:13:12.43 0.3 undecidable manual S 208 21.9669 128 0.27 70
IV.TERO.HHZ. 2021-01-29T05:13:12.96 0.3 undecidable manual S 142 26.0517 122 -0.09 75
IV.NRCA.HNZ. 2021-01-29T05:13:12.64 0.3 undecidable manual S 277 24.1536 125 0.01 75
IV.GAVE.EHZ. 2021-01-29T05:13:11.22 0.3 undecidable manual P 253 43.9227 108 0.01 72
IV.CESI.HHZ. 2021-01-29T05:13:11.53 0.3 undecidable manual P 298 46.4202 107 -0.05 71
IV.MF5.EHZ. 2021-01-29T05:13:11.90 0.3 undecidable manual S 12 20.2686 130 0.09 74
IV.MML1.HNE. 2021-01-29T05:13:11.77 0.3 undecidable manual P 314 49.0176 106 -0.2 68
IV.SMA1.EHZ. 2021-01-29T05:13:11.58 0.3 undecidable manual S 197 20.6682 130 -0.31 72
IV.GIGS.HHN. 2021-01-29T05:13:10.53 0.3 undecidable manual P 161 41.625 109 -0.36 68
IV.RM33.EHZ. 2021-01-29T05:13:10.20 0.3 undecidable manual P 206 36.8298 112 0 73
IV.LNSS.HHZ. 2021-01-29T05:13:10.37 0.3 undecidable manual P 233 37.7289 112 0.05 72
IT.MTCL.HGZ. 2021-01-29T05:13:10.32 0.1 undecidable manual P 302 39.1275 111 -0.2 93
IV.CSP1.EHZ. 2021-01-29T05:13:09.88 0.1 negative manual P 332 35.5422 113 -0.12 95
IV.CAMP.HHE. 2021-01-29T05:13:09.18 0.3 undecidable manual P 180 30.2475 118 -0.09 74
IV.FDMO.HHZ. 2021-01-29T05:13:09.90 0.3 undecidable manual P 314 36.3414 112 -0.22 70
IV.MNTT.EHZ. 2021-01-29T05:13:09.61 0.3 undecidable manual P 28 31.9458 116 0.11 72
IV.GUMA.HHZ. 2021-01-29T05:13:09.11 0.1 negative manual P 348 28.749 119 0.04 99
IV.MMO1.EHZ. 2021-01-29T05:13:09.79 0.3 undecidable manual S 326 12.0768 147 -0.56 67
IV.SAP2.EHE. 2021-01-29T05:13:09.66 0.6 undecidable manual P 359 31.9458 116 0.16 48
IV.OFFI.HHZ. 2021-01-29T05:13:09.13 0.3 undecidable manual P 58 26.4513 122 0.37 69
IV.SMA1.EHZ. 2021-01-29T05:13:08.03 0.1 positive manual P 197 20.6682 130 -0.01 100
IV.T1299.EHZ. 2021-01-29T05:13:08.32 0.1 undecidable manual P 208 21.9669 128 0.13 97
IV.TERO.HHZ. 2021-01-29T05:13:08.60 0.3 undecidable manual P 142 26.0517 122 -0.11 74
IV.NRCA.HNZ. 2021-01-29T05:13:08.38 0.1 undecidable manual P 277 24.1536 125 -0.08 98
IV.MF5.EHZ. 2021-01-29T05:13:07.92 0.1 undecidable manual P 12 20.2686 130 -0.07 99
IV.MMO1.EHZ. 2021-01-29T05:13:06.83 0.3 undecidable manual P 326 12.0768 147 -0.31 72
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHN. ML:2.0 0.00048150000000000005 0.3 AML other m 2021-01-29T05:13:12.28
IV.SMA1.EHE. ML:2.0 0.0005420000000000001 0.12 AML other m 2021-01-29T05:13:12.13
IV.MNTT.EHE. ML:2.0 0.00041349999999999997 0.88 AML other m 2021-01-29T05:13:13.94
IV.TERO.HHN. ML:1.2 0.00007500000000000001 0.34 AML other m 2021-01-29T05:13:13.72
IV.TERO.HHE. ML:1.3 0.0000776 0.18 AML other m 2021-01-29T05:13:13.72
IV.GUMA.HHE. ML:2.2 0.0006779999999999999 0.2 AML other m 2021-01-29T05:13:14.27
IV.GUMA.HHN. ML:2.0 0.00041700000000000005 0.42 AML other m 2021-01-29T05:13:14.28
IV.FDMO.HHE. ML:1.7 0.0001615 0.58 AML other m 2021-01-29T05:13:15.90
IV.CSP1.EHE. ML:2.0 0.000316 0.28 AML other m 2021-01-29T05:13:15.79
IV.FDMO.HHN. ML:1.8 0.000191 0.28 AML other m 2021-01-29T05:13:15.86
IV.RM33.EHN. ML:1.5 0.00010575000000000001 0.2 AML other m 2021-01-29T05:13:16.20
IV.RM33.EHE. ML:1.7 0.00016749999999999998 0.12 AML other m 2021-01-29T05:13:16.41
IV.CSP1.EHN. ML:2.0 0.00034250000000000003 0.88 AML other m 2021-01-29T05:13:16.84
IV.LNSS.HHN. ML:1.9 0.0002575 0.14 AML other m 2021-01-29T05:13:17.02
IV.LNSS.HHE. ML:1.8 0.000194 0.98 AML other m 2021-01-29T05:13:17.08
IV.MNTT.EHN. ML:1.6 0.00016199999999999998 0.88 AML other m 2021-01-29T05:13:18.77
IV.GAVE.EHN. ML:1.7 0.00013350000000000002 0.28 AML other m 2021-01-29T05:13:18.94
IV.CESI.HHN. ML:1.4 0.00006845 1.48 AML other m 2021-01-29T05:13:19.24
IV.GAVE.EHE. ML:1.7 0.00014050000000000003 0.68 AML other m 2021-01-29T05:13:19.37
IV.CESI.HHE. ML:1.3 0.00005135 0.76 AML other m 2021-01-29T05:13:19.43
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