Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 04-10-2020 and time 05:30:34 (Italy) in region 2 km E Roccafluvione (AP)

A magnitude ML 2.1 earthquake occured in region: 2 km E Roccafluvione (AP), on

  • 04-10-2020 03:30:34 (UTC)
  • 04-10-2020 05:30:34 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.8590, 13.4980 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
Roccafluvione AP 2 2010 2010
Venarotta AP 3 2066 4076
Palmiano AP 6 196 4272
Ascoli Piceno AP 7 49407 53679
Force AP 12 1354 55033
Folignano AP 12 9241 64274
Rotella AP 12 906 65180
Acquasanta Terme AP 12 2916 68096
Comunanza AP 13 3166 71262
Castignano AP 14 2796 74058
Montegallo AP 14 523 74581
Valle Castellana TE 14 977 75558
Appignano del Tronto AP 15 1785 77343
Montedinove AP 15 488 77831
Montemonaco AP 15 604 78435
Montefalcone Appennino FM 15 424 78859
Maltignano AP 16 2401 81260
Montefortino FM 16 1178 82438
Civitella del Tronto TE 17 5116 87554
Smerillo FM 17 365 87919
Montalto delle Marche AP 17 2122 90041
Castel di Lama AP 18 8634 98675
Amandola FM 18 3629 102304
Montelparo FM 18 778 103082
Santa Vittoria in Matenano FM 18 1330 104412
Offida AP 18 5058 109470
Sant'Egidio alla Vibrata TE 18 9811 119281
Arquata del Tronto AP 19 1178 120459
Rocca Santa Maria TE 19 537 120996
Castorano AP 19 2380 123376
Monte San Martino MC 20 765 124141

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km NW of Teramo (54892 inhabitants)
57 Km N of L'Aquila (69753 inhabitants)
66 Km NW of Montesilvano (53738 inhabitants)
66 Km E of Foligno (57155 inhabitants)
73 Km NW of Pescara (121014 inhabitants)
77 Km E of Terni (111501 inhabitants)
79 Km NW of Chieti (51815 inhabitants)
84 Km S of Ancona (100861 inhabitants)
94 Km E of Perugia (166134 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 2020-10-04
03:30:34		 42.8592 13.4983 22 2021-02-26
14:56:11		 Bollettino Sismico Italiano INGV 85592411
Reviewed
Rev100 		ML 2.2 2020-10-04
03:30:35		 42.8572 13.4792 20 2020-10-04
03:40:43		 Sala Sismica INGV-Roma 83485371
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-04 03:30:34 ± 0.1
Latitude 42.8592 ± 0.0036
Longitude 13.4983 ± 0.0074
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 85592411

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 580
Semi-minor axis of confidence ellipse (meter) 35
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 91
Circular confidence region, given by single value of horizontal uncertainty (meter) 580.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 63
Number of associated phases, regardless of their use for origin computation 35
Number of defining phases 35
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.12680
Epicentral distance of station farthest from the epicenter (degree) 0.60614
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 25
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 38
Type of magnitude ML
Reference to an origin 85592411
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-12-21 03:27:50

ML:2.2

Field Value
Value 2.2
Uncertainty 0.2
Num. used stations 22
Type of magnitude ML
Reference to an origin 83485371
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-04 03:40:43
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CAMP.HHE. 2020-10-04T03:30:48.18 0.6 undecidable manual S 192 36.6411 112 0.47 45
IV.ARRO.EHZ. 2020-10-04T03:30:47.17 0.6 undecidable manual P 243 67.2771 101 0.3 44
IV.T1299.HNZ. 2020-10-04T03:30:46.75 0.6 undecidable manual S 215 30.5472 117 0.51 44
IV.SMA1.EHZ. 2020-10-04T03:30:46.10 0.6 undecidable manual S 208 28.6491 119 0.31 47
IV.MNTT.EHZ. 2020-10-04T03:30:45.17 0.3 undecidable manual S 19 23.8539 125 0.46 69
IV.GUMA.HHZ. 2020-10-04T03:30:45.48 0.3 undecidable manual S 330 26.1516 122 0.25 71
IV.TERO.HHZ. 2020-10-04T03:30:45.34 0.6 undecidable manual S 162 27.5502 120 -0.21 48
IV.MC2.EHZ. 2020-10-04T03:30:45.68 0.6 undecidable manual S 283 25.8519 122 0.53 44
IV.CESI.HHZ. 2020-10-04T03:30:44.51 0.1 positive manual P 289 50.9157 105 0.11 94
IV.LNSS.HHZ. 2020-10-04T03:30:44.00 0.1 positive manual P 233 46.9197 107 0.19 93
IV.MML1.HNE. 2020-10-04T03:30:44.40 0.1 undecidable manual P 304 51.2154 105 -0.05 95
IV.GAVE.EHZ. 2020-10-04T03:30:44.25 0.1 undecidable manual P 250 52.6029 104 -0.4 88
IV.GIGS.HHN. 2020-10-04T03:30:43.19 0.1 undecidable manual P 172 45.4212 107 -0.4 88
IV.RM33.EHZ. 2020-10-04T03:30:43.81 0.1 positive manual P 211 45.2214 107 0.25 92
IV.FEMA.HNE. 2020-10-04T03:30:42.88 0.1 undecidable manual P 288 38.2284 111 0.34 91
IV.CAMP.HHE. 2020-10-04T03:30:42.12 0.1 undecidable manual P 192 36.6411 112 -0.19 94
IV.MMO1.EHZ. 2020-10-04T03:30:42.47 0.3 undecidable manual S 288 14.6742 141 -0.43 71
IV.CSP1.EHE. 2020-10-04T03:30:42.00 0.1 undecidable manual P 317 35.1426 113 -0.1 96
IV.TRTR.HHE. 2020-10-04T03:30:42.45 0.6 undecidable manual P 99 34.2435 114 0.47 45
IV.MF5.EHZ. 2020-10-04T03:30:42.39 0.6 undecidable manual S 348 14.5743 141 -0.5 46
IV.FDMO.HHZ. 2020-10-04T03:30:42.54 0.1 positive manual P 301 38.7279 111 -0.08 96
IV.MTRA.HNZ. 2020-10-04T03:30:42.50 0.3 undecidable manual S 216 14.0748 142 -0.3 73
IV.NRCA.HNZ. 2020-10-04T03:30:41.64 0.3 undecidable manual P 265 31.3464 116 0.06 73
IV.T1299.HNZ. 2020-10-04T03:30:41.65 0.1 positive manual P 215 30.5472 117 0.19 96
IV.SMA1.EHZ. 2020-10-04T03:30:41.18 0.1 positive manual P 208 28.6491 119 -0.02 99
IV.MNTP.HNZ. 2020-10-04T03:30:41.48 0.6 undecidable manual P 356 30.9468 117 -0.04 49
IV.SAP2.EHZ. 2020-10-04T03:30:41.01 0.6 undecidable manual P 343 27.5502 120 -0.05 49
IV.TERO.HHZ. 2020-10-04T03:30:40.87 1.0 undecidable manual P 162 27.5502 120 -0.19 24
IV.MC2.EHZ. 2020-10-04T03:30:40.96 0.1 positive manual P 283 25.8519 122 0.13 97
IV.MNTT.EHZ. 2020-10-04T03:30:40.64 0.1 negative manual P 19 23.8539 125 0.06 100
IV.GUMA.HHZ. 2020-10-04T03:30:40.76 0.3 undecidable manual P 330 26.1516 122 -0.12 73
IV.MF5.EHZ. 2020-10-04T03:30:39.28 0.1 negative manual P 348 14.5743 141 -0.25 97
IV.MTRA.HNZ. 2020-10-04T03:30:39.27 0.1 positive manual P 216 14.0748 142 -0.2 98
IV.OFFI.HHZ. 2020-10-04T03:30:39.71 0.1 negative manual P 61 17.3715 135 -0.1 99
IV.MMO1.EHZ. 2020-10-04T03:30:39.27 0.1 positive manual P 288 14.6742 141 -0.26 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.EHN. ML:2.2 0.00128 0.66 AML other m 2020-10-04T03:30:44.63
IV.MTRA.HNE. ML:2.2 0.0020215 0.9 AML other m 2020-10-04T03:30:44.63
IV.MNTT.EHN. ML:2.6 0.0017775 0.42 AML other m 2020-10-04T03:30:45.49
IV.GUMA.HHE. ML:2.3 0.000867 0.26 AML other m 2020-10-04T03:30:45.67
IV.GUMA.HHN. ML:2.2 0.000665 0.18 AML other m 2020-10-04T03:30:45.62
IV.SMA1.EHN. ML:2.2 0.0007099999999999999 0.2 AML other m 2020-10-04T03:30:46.39
IV.SMA1.EHE. ML:2.1 0.000516 0.34 AML other m 2020-10-04T03:30:46.51
IV.MNTT.EHE. ML:2.5 0.00145 1.1 AML other m 2020-10-04T03:30:47.63
IV.NRCA.HHE. ML:2.4 0.0008874999999999999 1.08 AML other m 2020-10-04T03:30:47.64
IV.NRCA.HNE. ML:2.3 0.0007880000000000001 1.1 AML other m 2020-10-04T03:30:47.65
IV.NRCA.HHN. ML:2.4 0.001009 0.9 AML other m 2020-10-04T03:30:47.24
IV.NRCA.HNN. ML:2.4 0.000948 0.88 AML other m 2020-10-04T03:30:47.25
IV.FDMO.HHN. ML:2.0 0.00035299999999999996 1.44 AML other m 2020-10-04T03:30:49.17
IV.FDMO.HHE. ML:2.0 0.000295 1.4 AML other m 2020-10-04T03:30:49.82
IV.RM33.EHN. ML:1.8 0.0001725 1.04 AML other m 2020-10-04T03:30:51.11
IV.RM33.EHE. ML:2.0 0.0002445 0.18 AML other m 2020-10-04T03:30:51.17
IV.LNSS.HHE. ML:1.9 0.0002135 1.2 AML other m 2020-10-04T03:30:52.38
IV.GAVE.EHN. ML:1.9 0.0001685 1.12 AML other m 2020-10-04T03:30:53.15
IV.GAVE.EHE. ML:2.1 0.0002805 1.84 AML other m 2020-10-04T03:30:53.06
IV.LNSS.HHN. ML:2.0 0.00024349999999999998 0.5 AML other m 2020-10-04T03:30:55.45
IV.MTRA.EHE. ML:2.3 0.0012371655 0.2 AML other m 2020-10-04T03:30:42.72
IV.MTRA.HNN. ML:2.2 0.0010706167999999998 0.12 AML other m 2020-10-04T03:30:42.83
IV.MF5.EHN. ML:2.2 0.0009649937 0.32 AML other m 2020-10-04T03:30:42.77
IV.MF5.EHE. ML:2.1 0.000824592 0.2416 AML other m 2020-10-04T03:30:42.92
IV.GUMA.HNE. ML:2.1 0.0006354349 0.1904 AML other m 2020-10-04T03:30:45.67
IV.GUMA.HNN. ML:2.1 0.0006101883999999999 0.6912 AML other m 2020-10-04T03:30:45.97
IV.TERO.HNE. ML:2.1 0.00052879285 0.24 AML other m 2020-10-04T03:30:45.55
IV.TERO.HNN. ML:1.8 0.00027778190000000004 0.3296 AML other m 2020-10-04T03:30:49.66
IV.TERO.HHE. ML:1.9 0.00031888025 0.1008 AML other m 2020-10-04T03:30:45.72
IV.TERO.HHN. ML:1.8 0.00024085075 0.2016 AML other m 2020-10-04T03:30:48.01
IV.SAP2.EHN. ML:2.6 0.0015472519999999998 0.2208 AML other m 2020-10-04T03:30:46.36
IV.SAP2.EHE. ML:1.9 0.00034863195 0.2192 AML other m 2020-10-04T03:30:46.80
IV.MNTP.HNN. ML:2.4 0.0009140693499999999 0.1008 AML other m 2020-10-04T03:30:47.21
IV.RM33.HNN. ML:1.8 0.00016929401999999998 0.2 AML other m 2020-10-04T03:30:51.01
IV.RM33.HNE. ML:2.0 0.0002813833 0.1904 AML other m 2020-10-04T03:30:51.16
IV.CESI.HHE. ML:1.7 0.0001205181 0.8 AML other m 2020-10-04T03:30:52.51
IV.CESI.HNN. ML:2.0 0.00024587044999999997 0.32 AML other m 2020-10-04T03:30:52.60
IV.CESI.HHN. ML:2.0 0.00024602239999999996 0.28 AML other m 2020-10-04T03:30:52.59
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